Update merge requests troubleshooting docs link

app/views/projects/merge_requests/show.html.haml

@@ -21,7 +21,7 @@
       window.gl.mrWidgetData = #{serialize_issuable(@merge_request, serializer: 'widget')}
 
       window.gl.mrWidgetData.squash_before_merge_help_path = '#{help_page_path("user/project/merge_requests/squash_and_merge")}';
-      window.gl.mrWidgetData.troubleshooting_docs_path = '#{help_page_path('user/project/merge_requests', anchor: 'troubleshooting')}';
+      window.gl.mrWidgetData.troubleshooting_docs_path = '#{help_page_path('user/project/merge_requests/index.md', anchor: 'troubleshooting')}';
 
     #js-vue-mr-widget.mr-widget