Flutter/Dart: Ignore lines_longer_than_80_chars only for strings in vscode

Question

with the rule when a format the code it becomes like this:

 final regex = 
     r'^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[!@#\$&*~]).{8,}$';

I want to keep like this when I format:

 final regex = r'^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[!@#\$&*~]).{8,}$';