ci(release): publish a GitHub release only from a tag so a manual run just builds

.github/workflows/build-release.yml

@@ -107,6 +107,7 @@ jobs:
           if-no-files-found: error
 
   release:
+    if: startsWith(github.ref, 'refs/tags/')
     needs: build
     runs-on: ubuntu-latest
     permissions:
@@ -121,6 +122,5 @@ jobs:
       - name: Create Release
         uses: softprops/action-gh-release@3bb12739c298aeb8a4eeaf626c5b8d85266b0e65  # v2.6.2
         with:
-          prerelease: ${{ !startsWith(github.ref, 'refs/tags/') }}
           generate_release_notes: true
           files: release/**