[epiphany] Update README.md once more

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 38ef52e85ac50750b93ee552121bf3508af68639
Author: Michael Catanzaro <mcatanzaro posteo net>
Date:   Sun Jul 22 23:55:34 2018 +0000

    Update README.md once more
    
    elementary has certainly earned an explicit mention.

 README.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/README.md b/README.md
index 52952ac15..3b86c2845 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,8 @@ guidelines will be considered a bug.
 ## GNOME Integration
 
 Epiphany's main goal is to be integrated with GNOME, as well as similar
-desktops. We don't aim to make Epiphany usable outside a GNOME environment.
+desktops (notably elementary OS). We don't aim to make Epiphany usable outside
+these environments.
 
 ## Preferences