Improve tag-if-missing job display name

This removes the duplicate wording from the caller's workflow name.

Author: elasticdog

.github/workflows/tag-if-missing.yml

@@ -17,7 +17,7 @@ on:
 
 jobs:
   tag_if_missing:
-    name: tag if missing
+    name: ensure tag exists
     runs-on: ubuntu-latest
     steps:
       - id: generate_token