Fix link to Jira service documentation

app/models/project_services/jira_service.rb

@@ -62,7 +62,7 @@ class JiraService < IssueTrackerService
   def help
     "You need to configure JIRA before enabling this service. For more details
     read the
-    [JIRA service documentation](#{help_page_url('project_services/jira')})."
+    [JIRA service documentation](#{help_page_url('user/project/integrations/jira')})."
   end
   def title

changelogs/unreleased/29929-jira-doc.yml

+---
+title: Fix link to Jira service documentation
+merge_request:
+author: