Update prettier.yml

Author: eightants

.github/workflows/prettier.yml

@@ -1,12 +1,10 @@
 # This is a basic workflow to help you get started with Actions
 
-name: CI
+name: Run Prettier
 
 # Controls when the action will run. Triggers the workflow on push or pull request
 # events but only for the master branch
 on:
-  push:
-    branches: [ master ]
   pull_request:
     branches: [ master ]