chore(deps): update hashicorp/setup-terraform action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -97,7 +97,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Setup Terraform
-        uses: hashicorp/setup-terraform@b9cd54a3c349d3f38e8881555d616ced269862dd # v3.1.2
+        uses: hashicorp/setup-terraform@5e8dbf3c6d9deaf4193ca7a8fb23f2ac83bb6c85 # v4.0.0
       - name: Install tflint
         run: |
           curl -s https://raw.githubusercontent.com/terraform-linters/tflint/master/install_linux.sh | bash