Update hashicorp/setup-terraform action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -77,7 +77,7 @@ jobs:
       - name: Run TFLint
         run: cd ${{ env.TF_DIR }} && tflint -f compact
 
-      - uses: hashicorp/setup-terraform@v3
+      - uses: hashicorp/setup-terraform@v4
         with:
           terraform_version: 1.14.3