More explicit link to xkcd in CoC (#38833)

cc @gspencergoog
https://dart.googlesource.com/external/github.com/flutter/flutter/+/e833a5820e798ad2e5920484b99a2d7bbb391460
1 file changed
tree: f9503c4812a018d41db2db091695a7d676e3ddcf
  1. commits.json