Make release workflow handle initial release?

Same as dentarg/gem-compare@5430e03

Author: dentarg

.github/workflows/release.yml

@@ -10,4 +10,4 @@ jobs:
     - uses: actions/checkout@v3
       with:
         fetch-depth: 0
-    - run: git push origin HEAD:v1
+    - run: git push origin HEAD:refs/heads/v1