Scope markdown link checks on PRs

Author: Muhtasham

.github/workflows/check-links.yaml

@@ -2,16 +2,29 @@ name: Check Markdown links
 
 on:
   workflow_dispatch:
-  push:
   pull_request:
   schedule:
     - cron: "0 0 1 * *"
 
 jobs:
-  markdown-link-check:
+  markdown-link-check-pr:
+    if: github.event_name == 'pull_request'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: gaurav-nelson/github-action-markdown-link-check@v1
+        with:
+          config-file: '.github/mlc_config.json'
+          check-modified-files-only: 'yes'
+          base-branch: 'main'
+
+  markdown-link-check-full:
+    if: github.event_name == 'workflow_dispatch' || github.event_name == 'schedule'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
       - uses: gaurav-nelson/github-action-markdown-link-check@v1
         with:
           config-file: '.github/mlc_config.json'