Potential fix for code scanning alert no. 8: Workflow does not contain permissions (#13)

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

Author: mfranzke

.github/workflows/ci.yml

@@ -79,6 +79,8 @@ jobs:
   lint-markdown:
     name: Lint Markdown
     runs-on: ubuntu-24.04
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout repository