ci: fix Stage names

azure-pipelines.yml

@@ -117,7 +117,7 @@ stages:
           - task: CmdLine@2
             inputs:
               script: pipenv run ./manage.py migrate
-      - job: coverage-unittest
+      - job: coverage_unittest
         pool:
           vmImage: 'ubuntu-latest'
         steps:
@@ -148,7 +148,7 @@ stages:
               targetPath: 'coverage-unittest'
               artifact: 'output-unittest/'
               publishLocation: 'pipeline'
-      - job: coverage-e2e
+      - job: coverage_e2e
         pool:
           vmImage: 'ubuntu-latest'
         steps:
@@ -198,7 +198,7 @@ stages:
               targetPath: 'coverage-e2e'
               artifact: 'output-e2e/'
               publishLocation: 'pipeline'
-  - stage: Test (combine)
+  - stage: test_combine
     jobs:
       - job: test_coverage_combine
         pool: