[gnome-logs] update GTK+ requirement in README

[Jonathan Kang <jonathankang src gnome org>]

commit a2804bd9de70293ff887c6c5f916edfd6ee7254e
Author: Jonathan Kang <jonathankang gnome org>
Date:   Wed May 23 10:02:00 2018 +0800

    update GTK+ requirement in README

 README | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/README b/README
index 5c713a0..ee437db 100644
--- a/README
+++ b/README
@@ -2,5 +2,5 @@ GNOME Logs is a log viewer for the systemd journal
 
 https://wiki.gnome.org/Apps/Logs
 
-It depends on GTK+ 3.10 or above, itstool and libsystemd-journal at build time,
+It depends on GTK+ 3.22.0 or above, itstool and libsystemd-journal at build time,
 and gsettings-desktop-schemas at runtime.