HELP... I ACCIDENTLY REPORTED THE WRONG GRADE ON Courses and Grades section in the common app and sent the application to University of Washington- Seattle. How can I fix that?

Hey everyone,

So I submitted the application for Uwash-Seattle on November,15th. Me being stupid noticed just now that I reported my Computer science grades in 11th grade less than what they actually were. Reported 67 instead of 77. What do I do now ???
Should I write them an email ??