[libadwaita/wip/exalm/buttons-again: 4/4] doc: Mention outline button changes in migration guide

[Alexander Mikhaylenko <alexm src gnome org>]

commit caa3f728d2c683210be626852fbe9332f7927df2
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sun Aug 1 23:59:15 2021 +0500

    doc: Mention outline button changes in migration guide
    
    We were telling people to change .list-button to .outline, now it's gone so
    update the guide.

 doc/migrating-libhandy-1-4-to-libadwaita.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/doc/migrating-libhandy-1-4-to-libadwaita.md b/doc/migrating-libhandy-1-4-to-libadwaita.md
index e0cfab44..8c41ad49 100644
--- a/doc/migrating-libhandy-1-4-to-libadwaita.md
+++ b/doc/migrating-libhandy-1-4-to-libadwaita.md
@@ -259,8 +259,8 @@ colors have been removed:
 * `@unfocused_insensitive_color`
 * `@unfocused_borders`
 
-The `.list-button` style class has been renamed to the more accurate name
-`.outline`.
+The `.list-button` style class has been removed, buttons have a similar
+appearance by default.
 
 The public colors `@theme_selected_bg_color` and `@theme_selected_fg_color` have
 been renamed to `@accent_bg_color` and `@accent_fg_color`.