chore: update GitHub Actions to latest major versions

- actions/checkout v4 → v6
- actions/setup-node v4 → v6
- cycjimmy/semantic-release-action v4 → v6 (pinned semantic_version: 24)
- github/codeql-action v3 → v4
- actions/stale v9 (already latest)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/codeql-analysis.yml

@@ -31,11 +31,11 @@ jobs:
         language: [ 'javascript' ]
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
+      uses: github/codeql-action/init@v4
       with:
         languages: ${{ matrix.language }}
 
@@ -44,4 +44,4 @@ jobs:
         npm run build --if-present
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
+      uses: github/codeql-action/analyze@v4