Add doc regarding nested groups limitation

doc/integration/jira_development_panel.md

@@ -94,7 +94,8 @@ Click these links to see your GitLab repository data.
 
 ## Limitations
 
-This integration is currently not supported on GitLab instances under a [relative url][relative-url] (e.g. `http://example.com/gitlab`).
+- This integration is currently not supported on GitLab instances under a [relative url][relative-url] (e.g. `http://example.com/gitlab`).
+- Projects under nested groups are not supported
 
 [existing-jira]: ../user/project/integrations/jira.md
 [jira-development-panel]: https://confluence.atlassian.com/adminjiraserver070/integrating-with-development-tools-776637096.html#Integratingwithdevelopmenttools-Developmentpanelonissues