ci test: don't run duplicated jobs for Dependabot

Author: kou

.github/workflows/test.yaml

@@ -12,10 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-name: test
+name: Test
 on:
-  - push
-  - pull_request
+  push:
+    branches-ignore:
+      - "dependabot/**"
+  pull_request:
 jobs:
   test:
     name: Test