fix wording for 'Check' and 'Submit' mismatch

common/lib/xmodule/xmodule/capa_base.py

@@ -1392,7 +1392,7 @@ class CapaMixin(CapaFields):
         self.track_function_unmask('save_problem_success', event_info)
         msg = _("Your answers have been saved.")
         if not self.max_attempts == 0:
-            msg = _("Your answers have been saved but not graded. Click 'Check' to grade them.")
+            msg = _("Your answers have been saved but not graded. Click 'Submit' to grade them.")
         return {
             'success': True,
             'msg': msg,