chore(ci): update workflows for v20111101.yml filename

Update GitHub Actions workflows to reference v20111101.yml instead of
mx_platform_api.yml after file rename for version clarity.

Also fix .gitignore to allow workflow files while blocking AI toolkit:
- Changed from broad .github/* pattern to specific subdirectories
- Now ignores: .github/instructions/*, .github/chatmodes/*, .github/prompts/*
- Allows: .github/workflows/* (CI/CD pipelines)

Files updated:
- .github/workflows/validate.yml
- .github/workflows/version.yml
- .github/workflows/update.yml
- .gitignore

Refs: devx-7466

Author: Nicki Nixon

.github/workflows/update.yml

@@ -28,7 +28,7 @@ jobs:
         id: changed-files-specific
         uses: tj-actions/changed-files@v41
         with:
-          files: openapi/mx_platform_api.yml
+          files: openapi/v20111101.yml
       - name: Generate access token
         id: generate_token
         uses: tibdex/github-app-token@v1

.github/workflows/validate.yml

@@ -10,9 +10,9 @@ jobs:
     - name: Validate OpenAPI Schema
       uses: thiyagu06/openapi-validator-action@v1
       with:
-        filepath: 'openapi/mx_platform_api.yml'
+        filepath: 'openapi/v20111101.yml'
     - name: Validate OpenAPI YAML
       uses: ibiqlik/action-yamllint@v3
       with:
-        file_or_dir: openapi/mx_platform_api.yml
+        file_or_dir: openapi/v20111101.yml
         config_file: .yamllint.yml

.github/workflows/version.yml

@@ -16,7 +16,7 @@ jobs:
         id: changed-files-specific
         uses: tj-actions/changed-files@v41
         with:
-          files: openapi/mx_platform_api.yml
+          files: openapi/v20111101.yml
 
       - name: Require version label if openapi spec changed
         if: steps.changed-files-specific.outputs.any_changed == 'true'

.gitignore

@@ -5,6 +5,8 @@
 .mcp.json
 .cursor/*
 .gemini/*
-.github/*
+.github/instructions/*
+.github/chatmodes/*
+.github/prompts/*
 .vscode/mcp.json
 # === End AI Toolkit ===