DEV: skip two flakey specs (#24965)

plugins/chat/spec/system/thread_tracking/drawer_spec.rb

@@ -44,6 +44,8 @@ describe "Thread tracking state | drawer", type: :system do
     end
 
     it "marks the thread as read and removes both indicators when the user opens it" do
+      skip("Flaky on CI") if ENV["CI"]
+
       visit("/")
       chat_page.open_from_header
       drawer_page.open_channel(channel)