Update mega-linter.yml

Author: lukemurraynz

.github/workflows/mega-linter.yml

@@ -31,7 +31,7 @@ jobs:
     steps:
       # Git Checkout
       - name: Checkout Code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           token: ${{ secrets.PAT || secrets.GITHUB_TOKEN }}
           fetch-depth: 0 # If you use VALIDATE_ALL_CODEBASE = true, you can remove this line to improve performances