fix tag refs

Author: lizhineng

.github/workflows/build.yml

@@ -76,13 +76,13 @@ jobs:
               run: make test-setup test-${{ matrix.variant }}
 
             - name: Login to GitHub Container Registry
-              if: startsWith(github.ref, 'refs/heads/v')
+              if: startsWith(github.ref, 'refs/tags/v')
               uses: docker/login-action@v3
               with:
                 registry: ghcr.io
                 username: ${{ github.actor }}
                 password: ${{ secrets.GITHUB_TOKEN }}
 
             - name: Push to GitHub Container Registry
-              if: startsWith(github.ref, 'refs/heads/v')
+              if: startsWith(github.ref, 'refs/tags/v')
               run: make push-${{ matrix.variant }}