chore(deps): update hashicorp/setup-terraform action to v4 (#123)

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

Author: renovate[bot]

.github/workflows/lint_terraform_planner.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/lint_terraform_webhook.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_planner_module.yaml

@@ -55,7 +55,7 @@ jobs:
             echo EOF
           } >> "$GITHUB_ENV"
       - run: juju add-model stg-deploy-planner
-      - uses: hashicorp/setup-terraform@v3.1.2
+      - uses: hashicorp/setup-terraform@v4.0.0
       - name: Generate admin token (ephemeral)
         run: |
           python3 - <<EOS >> "$GITHUB_ENV"

.github/workflows/test_terraform_webhook_module.yaml

@@ -55,7 +55,7 @@ jobs:
             echo EOF
           } >> "$GITHUB_ENV"
       - run: juju add-model stg-deploy-webhook-gateway
-      - 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