Potential fix for code scanning alert no. 6: Workflow does not contain permissions

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

Author: reece

.github/workflows/main.yml

@@ -9,6 +9,8 @@ on:
 
 jobs:
   quality:
+    permissions:
+      contents: read
     runs-on: ubuntu-latest
     steps:
       - name: Check out