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>

.github/workflows/ci.yml

@@ -8,6 +8,8 @@ on:
 jobs:
   ci:
     runs-on: ${{ matrix.os }}
+    permissions:
+      contents: read
     strategy:
       fail-fast: false
       matrix: