Update staticanalysis-bot.rst (#2120)
Update staticanalysis-bot.rst (#2120)

The variable `TRY_GROUP_ID` doesn't exist in the environment instead `TRY_TASK_GROUP_ID` is used.
La0/mozilla-relengapi,La0/mozilla-relengapi,mozilla-releng/services,La0/mozilla-relengapi,mozilla-releng/services,mozilla-releng/services,La0/mozilla-relengapi,mozilla-releng/services