fix: add permissions to GitHub workflow

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

Author: satta

.github/workflows/go.yml

@@ -8,6 +8,8 @@ on:
 jobs:
   build:
     name: "Go build"
+    permissions:
+      contents: read
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2