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

Author: renovate[bot]

.github/workflows/test_terraform_module_lint.yaml

@@ -35,7 +35,7 @@ jobs:
               uses: actions/checkout@v6.0.2
 
             - name: Setup Terraform
-              uses: hashicorp/setup-terraform@v3.1.2
+              uses: hashicorp/setup-terraform@v4.0.0
 
             - name: Run terraform fmt
               run: terraform fmt -check -recursive

.github/workflows/test_terraform_module_plan.yaml

@@ -53,7 +53,7 @@ jobs:
             echo EOF
           } >> "$GITHUB_ENV"
       - run: juju add-model test-github-runner
-      - uses: hashicorp/setup-terraform@v3.1.2
+      - uses: hashicorp/setup-terraform@v4.0.0
       - run: terraform init
         working-directory: ${{env.WORKING_DIR}}
       - run: terraform validate