feat(ci): ensure docs are up-to-date on PRs (#767)

relates to STACKITTPR-153

.github/pull_request_template.md

@@ -12,7 +12,7 @@ relates to #1234
 - [ ] Issue was linked above
 - [ ] Code format was applied: `make fmt`
 - [ ] Examples were added / adjusted (see `examples/` directory)
-- [ ] Docs are up-to-date: `make generate-docs`
+- [x] Docs are up-to-date: `make generate-docs` (will be checked by CI)
 - [ ] Unit tests got implemented or updated
 - [ ] Acceptance tests got implemented or updated (see e.g. [here](https://github.com/stackitcloud/terraform-provider-stackit/blob/f5f99d170996b208672ae684b6da53420e369563/stackit/internal/services/dns/dns_acc_test.go))
 - [x] Unit tests are passing: `make test` (will be checked by CI)

.github/workflows/ci.yaml

@@ -12,13 +12,23 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      
       - name: Build
         uses: ./.github/actions/build
         with:
           go-version: ${{ env.GO_VERSION }}
+      
       - name: Setup Terraform
         uses: hashicorp/setup-terraform@v2
+        with:
+          terraform_wrapper: false
+
+      - name: "Ensure docs are up-to-date"
+        if: ${{ github.event_name == 'pull_request' }}
+        run: ./scripts/check-docs.sh
+
       - name: Lint
         run: make lint
+      
       - name: Test
         run: make test