Update update-changelog.yml

Author: Varnasr

.github/workflows/update-changelog.yml

@@ -8,6 +8,9 @@ on:
 jobs:
   changelog:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
@@ -22,6 +25,9 @@ jobs:
       - name: Install dependencies
         run: npm install
 
+      - name: Validate auto-changelog configuration
+        run: npx auto-changelog --validate
+
       - name: Generate CHANGELOG.md
         run: npm run changelog