Link to documentation in Jira app

ee/app/controllers/jira_connect/app_descriptor_controller.rb

@@ -21,6 +21,9 @@ class JiraConnect::AppDescriptorController < JiraConnect::ApplicationController
         name: 'GitLab',
         url: 'https://gitlab.com'
       },
+      links: {
+        documentation: help_page_url('integration/jira_development_panel', anchor: 'gitlabcom-1')
+      },
       authentication: {
         type: 'jwt'
       },

ee/changelogs/unreleased/223943_feature_add_documentation_link_to_gitlab_for_jira_app.yml

+---
+title: Link documentation from GitLab for Jira app
+merge_request: 35227
+author:
+type: added

ee/spec/controllers/jira_connect/app_descriptor_controller_spec.rb

@@ -13,6 +13,9 @@ RSpec.describe JiraConnect::AppDescriptorController do
         'lifecycle' => {
           'installed' => '/events/installed',
           'uninstalled' => '/events/uninstalled'
+        },
+        'links' => {
+          'documentation' => 'http://test.host/help/integration/jira_development_panel#gitlabcom-1'
         }
       )
     end