[gnome-games] README.md: Mention matrix and irc

[Alexander Mikhaylenko <alexm src gnome org>]

commit 824ea2c59359bf2cd222b2aa94a0f1fc1de49f25
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sun Dec 1 15:02:39 2019 +0500

    README.md: Mention matrix and irc

 README.md | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/README.md b/README.md
index b7b76133..ad558d0f 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ speedrunning tools or video game development tools.
 - Issues:       https://gitlab.gnome.org/GNOME/gnome-games/issues
 - Download:     https://download.gnome.org/sources/gnome-games/
 - Mailing list: https://mail.gnome.org/mailman/listinfo/games-list
+- Matrix room:  https://matrix.to/#/#gnome-games:matrix.org
+- IRC channel:  #gnome-games on irc.gnome.org
 
 ## Contribution guide
 https://gitlab.gnome.org/GNOME/gnome-games/blob/master/HACKING