run release only on tagging

.github/workflows/build.yaml

@@ -223,7 +223,8 @@ jobs:
   release: 
     runs-on: ubuntu-latest
     needs: [pack-for-OTA-v2, pack-for-fresh-install]
-
+    if: startsWith(github.ref, 'refs/tags/') 
+      
     steps:
     - uses: actions/checkout@v2