Fix Approve merge request capitalisation on tests

app/assets/javascripts/merge_request_widget/approvals/components/approvals_body.js

@@ -85,7 +85,7 @@ Vue.component('approvals-body', {
           :disabled='approving'
           @click='approveMergeRequest'
           class='btn btn-primary approve-btn'>
-          Approve Merge Request
+          Approve merge request
         </button>
       </div>
     </div>

features/steps/project/merge_requests.rb

@@ -611,7 +611,7 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
   step 'I click link "Approve"' do
     page.within '.mr-state-widget' do
       wait_for_ajax
-      click_button 'Approve Merge Request'
+      click_button 'Approve merge request'
     end
   end
 

spec/features/merge_requests/approvals_spec.rb

@@ -309,7 +309,7 @@ end
 
 def approve_merge_request
   page.within '.mr-state-widget' do
-    click_button 'Approve Merge Request'
+    click_button 'Approve merge request'
   end
   wait_for_ajax
 end