[ANN] Default branch rename from 'master' to 'main'

[Aleksander Morgado]

Hey all,

As part of https://gitlab.freedesktop.org/mobile-broadband/libmbim/-/issues/22,
I've created a new "main" branch as a copy of "master", and I'll
remove the "master" branch sometime in the next few weeks.

The new "main" branch is already the default one in the repo, so all
MRs will be against that branch from now on.

If you have a local clone of the repository, please rename your local
branch as well and point it to the new default branch in the remote:

$ git checkout master
$ git branch -m master main
$ git fetch
$ git branch --unset-upstream
$ git branch -u origin/main

-- 
Aleksander
https://aleksander.es