replace use of unsupported trigger method with click

spec/features/merge_requests/mini_pipeline_graph_spec.rb

@@ -83,7 +83,7 @@ feature 'Mini Pipeline Graph', :js do
     end
 
     before do
-      toggle.trigger('click')
+      toggle.click
       wait_for_requests
     end
 

spec/features/projects/commit/mini_pipeline_graph_spec.rb

@@ -18,7 +18,7 @@ feature 'Mini Pipeline Graph in Commit View', :js do
 
       expect(page).to have_selector('.mr-widget-pipeline-graph')
 
-      first('.mini-pipeline-graph-dropdown-toggle').trigger('click')
+      first('.mini-pipeline-graph-dropdown-toggle').click
 
       wait_for_requests