Mark admin feature test as flaky

Author: Jonathan Tapia

admin/spec/features/return_reasons_spec.rb

@@ -79,7 +79,7 @@
       expect(page).to be_axe_clean
     end
 
-    it "closing the modal keeps query params" do
+    it "closing the modal keeps query params", :flaky do
       within("dialog") { click_on "Cancel" }
       expect(page).not_to have_selector("dialog")
       expect(page.current_url).to include(query)