Potential fix for code scanning alert no. 14: Workflow does not contain permissions (#50)

Signed-off-by: Dargon789 <64915515+Dargon789@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: Dargon789

.github/workflows/claude-pr-metadata-update.yml

@@ -17,6 +17,9 @@ on:
   pull_request:
     types: [opened, synchronize, ready_for_review]
 
+permissions:
+  contents: read
+
 # Concurrency: Cancel in-flight runs for the same PR
 concurrency:
   group: pr-metadata-${{ github.event.pull_request.number }}