Potential fix for code scanning alert no. 1: Workflow does not contain permissions (#423)

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

.github/workflows/build.yml

@@ -5,6 +5,9 @@ on:
     branches: ['main']
   pull_request:
 
+permissions:
+  contents: read
+
 env:
   CARGO_TERM_COLOR: always