Attempt to fix flaky spec in `user_edits_issue_spec.rb`

spec/features/issues/user_edits_issue_spec.rb

@@ -146,7 +146,7 @@ RSpec.describe "Issues > User edits issue", :js do
           fill_in 'Comment', with: '/label ~syzygy'
 
           click_button 'Comment'
-          expect(page).to have_text('added syzygy label just now')
+          expect(page).to have_text('added syzygy label just now', wait: 300)
 
           page.within '.block.labels' do
             # Remove `verisimilitude` label