Added missing permissions to failed PR validation step (#577)

* Added missing permissions to failed PR validation step

The 'https://github.com/stefanzweifel/git-auto-commit-action' project requires specific permissions, since they are missing the workflow fails with access denied.

https://logzio.atlassian.net/browse/CORE-351

* Fix permissions key indent level & added default permissions

* Unexpected value 'metadata'

.github/workflows/pr_validate.yaml

@@ -11,6 +11,9 @@ jobs:
     runs-on: ubuntu-latest
     env:
       MANIFEST_PATH: '_manifest/validation_manifest.json'
+    permissions:
+      contents: 'write'
+      packages: 'read'
     steps:
       - name: Checkout PR
         uses: actions/checkout@v4
@@ -103,7 +106,7 @@ jobs:
           file_pattern: './static/manifest.json'
           commit_message: 'auto generated manifest'
           commit_options: "--no-gpg-sign"
-          push_options: '--force'
+          push_options: '--force'      
       - name: Manifest update success
         if: steps.create_manifest.outputs.skip_next_step != 'true' && steps.run_validation.outputs.skip_next_step != 'true'
         run: |