fix: docusaurus-version should work with subcategory

[endiliey]

Motivation

Fix #1115

Have you read the Contributing Guidelines on pull requests?

Yes

Test Plan

{
  "docs": {
    "Welcome": [
      "index"
    ],
    "Ecosystem": [
      "ecosystem/ecosystem-overview",
      "ecosystem/ecosystem-cloud-native",
      "ecosystem/ecosystem-versioning",
      "ecosystem/ecosystem-upgrading",
      "ecosystem/ecosystem-examples",
      "ecosystem/ecosystem-sqa"
    ],
    "ORY Hydra": [
      "hydra/hydra-index",
      {
        "type": "subcategory",
        "label": "Getting Started",
        "ids": [
          "hydra/hydra-5min-tutorial"
        ]
      },
      {
        "type": "subcategory",
        "label": "Guides",
        "ids": [
          "hydra/hydra-oauth2",
          "hydra/hydra-jwks",
          "hydra/hydra-configure-deploy",
          "hydra/hydra-advanced",
          "hydra/hydra-debugging",
          "hydra/hydra-production",
          "hydra/hydra-integration"
        ]
      },
      {
        "type": "subcategory",
        "label": "SDK",
        "ids": [
          "hydra/sdk/hydra-sdk-index",
          "hydra/sdk/hydra-sdk-api",
          "hydra/sdk/hydra-sdk-go",
          "hydra/sdk/hydra-sdk-js"
        ]
      },
      {
        "type": "subcategory",
        "label": "Further Reading",
        "ids": [
          "hydra/hydra-limitations",
          "hydra/hydra-dependencies-environment",
          "hydra/hydra-security-architecture",
          "hydra/hydra-faq",
          "hydra/hydra-appendix"
        ]
      }
    ],
    "ORY Oathkeeper": [
      "oathkeeper/oathkeeper-index",
      {
        "type": "subcategory",
        "label": "Guides",
        "ids": [
          "oathkeeper/oathkeeper-api-access-rules",
          "oathkeeper/oathkeeper-configure-deploy",
          "oathkeeper/oathkeeper-control-flow"
        ]
      },
      {
        "type": "subcategory",
        "label": "SDK",
        "ids": [
          "oathkeeper/sdk/oathkeeper-sdk-api"
        ]
      }
    ],
    "ORY Keto": [
      "keto/keto-index",
      "keto/1-overview/keto-overview-1-policies",
      "keto/1-overview/keto-overview-2-warden",
      "keto/1-overview/keto-overview-3-roles",
      "keto/1-overview/keto-overview-4-best-practices",
      "keto/1-overview/keto-overview-5-conditions",
      "keto/1-overview/keto-overview-6-installation",
      "keto/1-overview/keto-overview-7-configuration",
      {
        "type": "subcategory",
        "label": "SDK",
        "ids": [
          "keto/sdk/keto-sdk-api"
        ]
      }
    ],
    "Performance": [
      "performance/performance-index",
      "performance/performance-hydra"
    ]
  }
}

Result:

{
  "version-oryOS.9-docs": {
    "Welcome": [
      "version-oryOS.9-index"
    ],
    "Ecosystem": [
      "version-oryOS.9-ecosystem/ecosystem-overview",
      "version-oryOS.9-ecosystem/ecosystem-cloud-native",
      "version-oryOS.9-ecosystem/ecosystem-versioning",
      "version-oryOS.9-ecosystem/ecosystem-upgrading",
      "version-oryOS.9-ecosystem/ecosystem-examples",
      "version-oryOS.9-ecosystem/ecosystem-sqa"
    ],
    "ORY Hydra": [
      "version-oryOS.9-hydra/hydra-index",
      {
        "type": "subcategory",
        "label": "Getting Started",
        "ids": [
          "version-oryOS.9-hydra/hydra-5min-tutorial"
        ]
      },
      {
        "type": "subcategory",
        "label": "Guides",
        "ids": [
          "version-oryOS.9-hydra/hydra-oauth2",
          "version-oryOS.9-hydra/hydra-jwks",
          "version-oryOS.9-hydra/hydra-configure-deploy",
          "version-oryOS.9-hydra/hydra-advanced",
          "version-oryOS.9-hydra/hydra-debugging",
          "version-oryOS.9-hydra/hydra-production",
          "version-oryOS.9-hydra/hydra-integration"
        ]
      },
      {
        "type": "subcategory",
        "label": "SDK",
        "ids": [
          "version-oryOS.9-hydra/sdk/hydra-sdk-index",
          "version-oryOS.9-hydra/sdk/hydra-sdk-api",
          "version-oryOS.9-hydra/sdk/hydra-sdk-go",
          "version-oryOS.9-hydra/sdk/hydra-sdk-js"
        ]
      },
      {
        "type": "subcategory",
        "label": "Further Reading",
        "ids": [
          "version-oryOS.9-hydra/hydra-limitations",
          "version-oryOS.9-hydra/hydra-dependencies-environment",
          "version-oryOS.9-hydra/hydra-security-architecture",
          "version-oryOS.9-hydra/hydra-faq",
          "version-oryOS.9-hydra/hydra-appendix"
        ]
      }
    ],
    "ORY Oathkeeper": [
      "version-oryOS.9-oathkeeper/oathkeeper-index",
      {
        "type": "subcategory",
        "label": "Guides",
        "ids": [
          "version-oryOS.9-oathkeeper/oathkeeper-api-access-rules",
          "version-oryOS.9-oathkeeper/oathkeeper-configure-deploy",
          "version-oryOS.9-oathkeeper/oathkeeper-control-flow"
        ]
      },
      {
        "type": "subcategory",
        "label": "SDK",
        "ids": [
          "version-oryOS.9-oathkeeper/sdk/oathkeeper-sdk-api"
        ]
      }
    ],
    "ORY Keto": [
      "version-oryOS.9-keto/keto-index",
      "version-oryOS.9-keto/1-overview/keto-overview-1-policies",
      "version-oryOS.9-keto/1-overview/keto-overview-2-warden",
      "version-oryOS.9-keto/1-overview/keto-overview-3-roles",
      "version-oryOS.9-keto/1-overview/keto-overview-4-best-practices",
      "version-oryOS.9-keto/1-overview/keto-overview-5-conditions",
      "version-oryOS.9-keto/1-overview/keto-overview-6-installation",
      "version-oryOS.9-keto/1-overview/keto-overview-7-configuration",
      {
        "type": "subcategory",
        "label": "SDK",
        "ids": [
          "version-oryOS.9-keto/sdk/keto-sdk-api"
        ]
      }
    ],
    "Performance": [
      "version-oryOS.9-performance/performance-index",
      "version-oryOS.9-performance/performance-hydra"
    ]
  }
}

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