fix: add variables: write permission for V1_LATEST_TAG update

The GITHUB_TOKEN needs variables: write permission to update
repo variables via the API.

Author: kjiang-ac

.github/workflows/bun-compile.yml

@@ -126,6 +126,7 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: write
+      variables: write
     steps:
       - name: Download all artifacts
         uses: actions/download-artifact@v4