Potential fix for code scanning alert no. 4: Workflow does not contain permissions

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

Author: chrmarti

.github/workflows/test-pr.yaml

@@ -2,6 +2,9 @@ name: "PR - Test Updated Templates"
 on:
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   detect-changes:
     runs-on: ubuntu-latest