Added language translation key

Author: yogeshsuhagiya

app/code/Magento/AdminNotification/i18n/en_US.csv

@@ -49,4 +49,4 @@ Severity,Severity
 "Date Added","Date Added"
 Message,Message
 Actions,Actions
-"You have viewed and resolved all recent system notices. Please refresh the web page to clear the notice alert.","You have viewed and resolved all recent system notices. Please refresh the web page to clear the notice alert."
+"You have viewed and resolved all recent system notices. Please refresh the web page to clear the notice alert.","You have viewed and resolved all recent system notices. Please refresh the web page to clear the notice alert."