Fix: update GitHub Actions version for markdownlint CI

Signed-off-by: sumitgiri87 <[email protected]>
Signed-off-by: Sumit Giri <[email protected]>

Author: sumitgiri87

.github/workflows/markdownlint.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Node.js
         uses: actions/setup-node@v4