PR Test Autocomment: Include Errors

Currently, only `yarn all`'s stdout is commented. However,
yarn may also produce relevant stdout, so we should include it.

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
           mkdir -p ./pr
           echo ${{ github.event.number }} | tee ./pr/number
           EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
-          echo "all_result<<$EOF" >> "$GITHUB_ENV"
+          echo "all_result<<$EOF" >> "$GITHUB_ENV" 2&>1
           yarn all >> "$GITHUB_ENV"
           echo "$EOF" >> "$GITHUB_ENV"
         id: all