Fix updating the v1 branch on automated releases

* Fixes https://github.com/ruby/setup-ruby/issues/618

.github/workflows/release.yml

@@ -18,3 +18,7 @@ jobs:
       with:
         ruby-version: '3.3'
     - run: ruby release.rb
+    # The same as the update-v1-branch.yml workflow.
+    # That workflow is not triggered by the release created above because of
+    # https://docs.github.com/en/actions/security-guides/automatic-token-authentication#using-the-github_token-in-a-workflow
+    - run: git push origin HEAD:v1

.github/workflows/update-v1-branch.yml

@@ -1,4 +1,4 @@
-name: Update the v1 branch when a release is published
+name: Update the v1 branch when a release is published manually
 on:
   release:
     types: [published]