Don't nag the author of bugs blocking `clouseau`

[calixteman]

For now the author is myself but in the future it'll be a bot.
It's up to the dev to check if it's a regression or not.

For reference:
https://bugzilla.mozilla.org/show_bug.cgi?id=2061127#c1

[marco-c]

@calixteman isn't clouseau going to set both the keyoword and the regressed by field?

[calixteman]

For now the idea is to let ni-ed devs decide if the regressor is correct or not.