[fractal] Change the matrix room alias to the canonical one in README.md

[Christopher Davis <christopherdavis src gnome org>]

commit e9cba51fff04a9741bb2c6b18c3dab865ca315bc
Author: Thibault Martin <mail thibaultmart in>
Date:   Sun Feb 14 12:17:07 2021 +0100

    Change the matrix room alias to the canonical one in README.md

 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/README.md b/README.md
index 02291fea..7918c91b 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Fractal is a Matrix messaging app for GNOME written in Rust. Its interface is optimized for collaboration in 
large groups, such as free software projects.
 
-* Come to talk to us on Matrix: <https://matrix.to/#/#fractal-gtk:matrix.org>
+* Come to talk to us on Matrix: <https://matrix.to/#/#fractal:gnome.org>
 * Main repository: <https://gitlab.gnome.org/GNOME/fractal/>
 
 ![screenshot](https://gitlab.gnome.org/GNOME/fractal/raw/master/screenshots/fractal.png)