review "run prettier manually"

because actually you do it through the Github UI--look for the three-dots menu

Author: ojf

.github/workflows/prettier.yml

@@ -1,14 +1,14 @@
 name: Prettier code formatter
 
 on:
-  # pull_request:
-  #   branches:
-  #     - master
-  #     - main
-  # push:
-  #   branches:
-  #     - master
-  #     - main
+  pull_request:
+    branches:
+      - master
+      - main
+  push:
+    branches:
+      - master
+      - main
 
 jobs:
   check: