Potential fix for code scanning alert no. 1: Workflow does not contain permissions

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

Author: kyr0

.github/workflows/build_and_test.yml

@@ -11,6 +11,8 @@ on:
 
 jobs:
   build:
+    permissions:
+      contents: read
     runs-on: ${{ matrix.os }}
     strategy:
       matrix: