chore(autotest): add git-action script

.github/workflows/run_broker_tests.yaml

@@ -14,7 +14,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     container: "ghcr.io/emqx/emqx-builder/5.0:23.2.7.2-emqx-2-ubuntu20.04"
-   outputs:
+    outputs:
       version: ${{ steps.build_docker.outputs.version}}
     steps:
     - name: download jmeter
@@ -37,4 +37,4 @@ jobs:
     - uses: actions/upload-artifact@v2
       with:
         name: emqx.tar
-        path: ./emqx.tar
+        path: ./emqx.tar