Add anchor to link

app/views/projects/_merge_request_merge_method_settings.html.haml

@@ -33,4 +33,4 @@
         = s_('ProjectSettings|When there is a merge conflict, the user is given the option to rebase.')
         %div
           = s_('ProjectSettings|If merge trains are enabled, merging is only possible if the branch can be rebased without conflicts.')
-          = link_to sprite_icon('question-o'), help_page_path('ci/pipelines/merge_trains.md'), target: '_blank', rel: 'noopener noreferrer'
+          = link_to sprite_icon('question-o'), help_page_path('ci/pipelines/merge_trains.md', anchor: 'enable-merge-trains'), target: '_blank', rel: 'noopener noreferrer'