Bump none-shall-pass GH action to v5

Signed-off-by: Vignesh Rao <[email protected]>

Author: dormant-user

.github/workflows/markdown-validation.yml

@@ -1,12 +1,13 @@
 name: none-shall-pass
 
 on:
-  push:
   workflow_dispatch:
+  push:
+    branches:
+      - main
 
 jobs:
   none-shall-pass:
     runs-on: self-hosted
     steps:
-      - uses: actions/checkout@v3
-      - uses: thevickypedia/[email protected]
+      - uses: thevickypedia/none-shall-pass@v5