print checksum differences when detected by --verify-only (#58064)

https://dart.googlesource.com/external/github.com/flutter/flutter/+/3373a4042a2ba715128a7e1ec3b0b848cdab73f2
1 file changed
tree: 8af8ac4c22a50c2c685db551541ab316c14f2736
  1. commits.json