[build] Define build workflow permissions (#288)

Author: mariuscoto

.github/workflows/build.yml

@@ -2,6 +2,10 @@ name: CI
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+  id-token: write
+
 concurrency:
   group: ${{ github.workflow }}${{ github.ref_name != github.event.repository.default_branch && github.ref || github.run_id }}
   cancel-in-progress: ${{ github.ref_name != github.event.repository.default_branch }}