Changes

https://wiki.mozilla.org/ReleaseEngineering/Buildduty/Other_Duties#To_build_new_nightlies

The above steps work equally well for triggering new Nightly builds, just use the "Create new nightly builds on mozilla-central revision" input box instead.

'''CAVEAT''': there are implications to triggering too many Nightly builds in a single day or in quick succession. Please talk with a sheriff first before retriggering Nightly builds.