Update awesomebot to ignore some 5xx results
Update awesomebot to ignore some 5xx results

Sometimes valid links return 5xx codes during `awesomebot` checks,
causing a failure during PR checks.

Ignore them, if something really goes offline it'll 404 eventually.

Signed-off-by: Joe Block <13bb081c6ac072ef78a3e348068e2204400d7335@unixorn.net>

unixorn/git-extra-commands,unixorn/git-extra-commands,unixorn/git-extra-commands,unixorn/git-extra-commands