chore: update docs branch reference from fix/docs-concepts to main

[devin-ai-integration]

Summary

Updates the sync-changelog-to-docs.yml workflow to reference main instead of the now-merged fix/docs-concepts branch in honeyhive-ai-docs. This resolves the TODO comments that were left in the workflow.

Two references updated:

• ref: when checking out the docs repo (line 40)
• base: when creating the PR against the docs repo (line 144)

This is part of a coordinated update across multiple repos (hive-kube, honeyhive-helm, hive-bot) that all referenced the same placeholder branch.

Review & Testing Checklist for Human

• Confirm fix/docs-concepts has been merged to main in honeyhive-ai-docs so the workflow won't break on next trigger

Notes

• Requested by: @sanjeed5
• Devin Session

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[claude]

Claude finished @devin-ai-integration[bot]'s task in 36s —— View job

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Review Complete

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LGTM — this is a clean, straightforward change.

The PR correctly updates both ref: (line 40) and base: (line 144) in sync-changelog-to-docs.yml from the temporary fix/docs-concepts branch to main, and removes the associated TODO comments. No functional, security, or compatibility concerns.

One prerequisite to verify before merging (as noted in the PR checklist): confirm that fix/docs-concepts has been merged to main in honeyhive-ai-docs, otherwise the workflow will fail on next trigger.

No documentation updates needed — this is an internal CI workflow change with no impact on public APIs or SDK behavior.