Potential fix for code scanning alert no. 1: Workflow does not contain permissions (#10)

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

Author: stacksjb

.github/workflows/codecov.yml

@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   coverage:
     runs-on: ubuntu-latest