[instructions] Sync github-agentic-workflows.md with release v0.33.12

[github-actions]

Instructions Update - Synchronized with v0.33.12

This PR updates the github-agentic-workflows.md file to document safe-output types that were missing from the instructions.

Changes Made

• Added upload-asset safe-output - Documents the newly standardized safe-output for publishing files to orphaned git branches (standardized in v0.33.12)
• Added hide-comment safe-output - Documents comment hiding functionality with configurable reasons (spam, abuse, off_topic, outdated, resolved)
• Added update-discussion safe-output - Documents discussion update capabilities for title, body, and labels
• Added assign-to-user safe-output - Documents user assignment functionality for issues and pull requests

Documentation Commits Reviewed

• c823387 Fix hardcoded absolute paths and missing mock in JS tests (test changes only, no documentation impact)

Release v0.33.12 Changes

Reviewed CHANGELOG for v0.33.12 (2025-12-22):

1. Added standalone awmg CLI for MCP server aggregation (tooling, not user-facing in workflows)
2. Modernized safe_outputs_tools_loader.cjs (internal refactoring, no behavioral changes)
3. Standardized safe output references to singular "upload-asset" (this necessitated the documentation update)

Validation

• Followed prompting best practices (imperative mood, minimal examples)
• Maintained technical tone and brevity
• Updated only necessary sections (added missing safe-outputs)
• Verified accuracy against current schema (pkg/parser/schemas/main_workflow_schema.json)
• Added concise, focused examples matching existing patterns
• Maintained alphabetical ordering of safe-output types
• Preserved consistent formatting and structure

AI generated by Instructions Janitor