update: generate only with new tag

.github/workflows/build.yml

@@ -50,7 +50,7 @@ jobs:
   publish-new-formula:
     # The type of runner that the job will run on
     runs-on: ubuntu-latest
-
+    if: startsWith(github.ref, 'refs/tags/v')
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Runs a single command using the runners shell
@@ -81,4 +81,4 @@ jobs:
           git push
         # env:
         #   SSH_AUTH_SOCK: /tmp/ssh_agent.sock
-      - run: echo "🍏 This job's status is ${{ job.status }}."
+      - run: echo "🍏 This job's status is ${{ job.status }}."