fix for code scanning alert no. 7: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Signed-off-by: Will <2185386+willhoy@users.noreply.github.com>

Author: willhoy

.github/workflows/formatting-check.yml

@@ -1,5 +1,7 @@
 name: clang-format Check
 on: [push, pull_request]
+permissions:
+  contents: read
 jobs:
   formatting-check:
     name: Formatting Check