fix(ci): correct typo groombok->groombook and fix Reset image cache-from indentation

- Fix API image tag typo: groombok -> groombook (line 103)
- Fix Reset image cache-from/cache-to indentation: moved from under tags: (12 spaces) to under with: (10 spaces)
- This corrects the Reset image build failure in CI runs.

.gitea/workflows/ci.yml

@@ -118,6 +118,17 @@ jobs:
           cache-from: type=registry,ref=git.farh.net/groombook/cache:migrate
           cache-to: type=registry,ref=git.farh.net/groombook/cache:migrate,mode=max
 
+      - name: Smoke test migrate image (blackhole npmjs.org)
+        run: |
+          set -euo pipefail
+          IMAGE="git.farh.net/groombook/migrate:${{ steps.version.outputs.tag }}"
+          docker pull "$IMAGE"
+          docker run --rm \
+            --add-host registry.npmjs.org:127.0.0.1 \
+            --entrypoint="" \
+            "$IMAGE" \
+            pnpm --version
+
       - name: Build and push Seed image
         uses: docker/build-push-action@v6
         with: