Restore id-token permission.

Removing it in ed2f21e was a mistake.

Author: aaugustin

.github/workflows/release.yml

@@ -71,6 +71,7 @@ jobs:
     # Don't release when running the workflow manually from GitHub's UI.
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
     permissions:
+      id-token: write
       contents: write
     steps:
       - name: Download artifacts