Update comment.yml (Azure#12213)

.github/comment.yml

@@ -38,7 +38,7 @@
 - rule:
     type: PROpen
     variables:
-      openapiHub: https://openapihub.test.azure-devex-tools.com/
+      openapiHub: https://portal.azure-devex-tools.com
     keywords:
       - "I have reviewed the [documentation](https://aka.ms/ameonboard) for the workflow."
     onOpenedComments: "Hi, @${PRAuthor} Thanks for your PR. I am workflow bot for review process. Here are some small tips. </br> <li> Please ensure to do self-check against checklists in first PR comment.</li> <li> PR assignee is the person auto-assigned and responsible for your current PR reviewing and merging. </li>   <li> For specs comparison cross API versions,  Use [API Specs Comparison Report Generator](${openapiHub}/tools/diff?pr=${owner}/${repo}/${PRNumber})</li>  <li> If there is CI failure(s), to fix CI error(s) is mandatory for PR merging; or you need to provide justification in PR comment for explanation. [How to fix?](https://github.com/Azure/azure-rest-api-specs/blob/master/documentation/ci-fix.md)</li></br> Any feedback about review process or workflow bot, pls contact swagger and tools team. vsswagger@microsoft.com"