Improve "Suspicious real name" message

First-time contributors may have a misconfigured Git and publish changes with their UNIX username or similar. The Sanity bot replies with "Suspicious real name".

The specific terminology used is borderline offensive; in case of a false positive, it's outright offensive. I know what the bot means ("I suspect you didn't configure git"), that's now that it says ("your name is suspicious").

It should be definitely improved by rephrasing, and explaining how to fix it. The link left as a comment ( https://wiki.qt.io/Early_Warning_System ) doesn't have any mention of "suspicious" (yes, this falls under 10.4 / 10.5, again, no indication of the fix).