Potential fix for pull request finding 'CodeQL / Workflow does not contain permissions'

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: Hjaf

.github/workflows/validate-repository-metadata.yml

@@ -6,6 +6,9 @@ on:
             - main
     workflow_dispatch:
 
+permissions:
+    contents: read
+
 jobs:
     validate-repository-metadata:
         name: validate-repository-metadata