[libadwaita] (5 commits) Non-fast-forward update to branch wip/exalm/alpha3

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/alpha3' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  872f17b... doc: A few migration guide fixes
  d00f9cb... doc: Add an alpha 2->3 migration guide
  2c69001... Release 1.0.0.alpha.3

Commits added to the branch:

  810ff79... Update Brazilian Portuguese translation (*)
  a2f2c07... Updated Czech translation (*)
  aef5a12... doc: A few migration guide fixes
  82c223a... doc: Add an alpha 2->3 migration guide
  40c19ab... Release 1.0.0.alpha.3

(*) This commit already existed in another branch; no separate mail sent