Update action.yml

Author: robmarkcole

.github/workflows/action.yml

@@ -3,10 +3,10 @@ name: Check Markdown links
 on:
   push:
     branches:
-      - main
-  # schedule:
-  #   # Run everyday at 9:00 AM (See https://pubs.opengroup.org/onlinepubs/9699919799/utilities/crontab.html#tag_20_25_07)
-  #   - cron: "0 9 * * *"
+      - master
+  pull_request:
+    branches:
+      - master
 
 jobs:
   markdown-link-check:
@@ -18,4 +18,4 @@ jobs:
         use-quiet-mode: 'no'
         use-verbose-mode: 'yes'
         config-file: '.mlc_config.json'
-        file-path: './README.md'
+        file-path: './README.md'