Merge pull request #550 from saito-hideki/pr/azp_update_image

[CI] Bump Azure test container to 6.0.0

SUMMARY
Replace AZP container image version with 6.0.0:

Fixes #549

ISSUE TYPE

CI tests Pull Request

COMPONENT NAME

ansible.posix

ADDITIONAL INFORMATION
See ansible-collections/news-for-maintainers#71

.azure-pipelines/azure-pipelines.yml

@@ -37,7 +37,7 @@ variables:
 resources:
   containers:
     - container: default
-      image: quay.io/ansible/azure-pipelines-test-container:main
+      image: quay.io/ansible/azure-pipelines-test-container:6.0.0
 
 pool: Standard