fixup! CI jobs: remove use of deprecated set-output

Fixes the output name to match the variable name that was changed in
fbf6eca. (The change in fbf6eca was unintentional, but makes it more
uniform with other output names.)

.github/workflows/release-brew.yaml

@@ -146,7 +146,7 @@ jobs:
         uses: actions/upload-release-asset@v1.0.2
         with:
           upload_url: ${{ github.event.release.upload_url }}
-          asset_path: ${{ steps.get_package_path.outputs.bottle }}
+          asset_path: ${{ steps.get_package_path.outputs.bottle_name }}
           asset_name: ${{ steps.get_file_name.outputs.file_name }}
           asset_content_type: application/x-gzip