remove wrong branch

Author: ddevsr

.github/workflows/label-signing.yml

@@ -4,7 +4,6 @@ on:
     branches:
       - 'develop'
       - '4.*'
-      - '.github/workflows/label-signing.yml'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}