Add explicit GITHUB_TOKEN permissions for security

Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yml

@@ -9,6 +9,9 @@ on:
 env:
   CARGO_TERM_COLOR: always
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: Test