How to update existing data using room database migration?

Question

I am using room database and I have user object like this,

User{
String id, email;
}

There are thousands of users added their mail. I found that many user's mail has spelling mistakes. In the next version I want to fix the spelling mistake.

Therefore, I increased room database version 1 to 2 and provided migration class but I don't know how to update the misspelled data using room. Do I have to implement migration or anything else?