misc: update actions/checkout version in workflow (#15)

Author: Harshil2107

.github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Node
         uses: actions/setup-node@v3
         with: