chore(deps): update actions/checkout action to v4 (#22)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ jobs:
         terraform-versions: [1.2.x, 1.3.x]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Terraform
         uses: hashicorp/[email protected]