[gimp-web] Added an Ubuntu Software Centre link

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 9dc5a75b45783582ff11d6b0ac2ebf504b66a87b
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Sat Jun 9 15:35:27 2012 +0400

    Added an Ubuntu Software Centre link

 downloads/Linux.xhtml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/downloads/Linux.xhtml b/downloads/Linux.xhtml
index 7659a32..5c26f1e 100644
--- a/downloads/Linux.xhtml
+++ b/downloads/Linux.xhtml
@@ -9,7 +9,7 @@ updates.</p>
 <h3>Ubuntu, Debian</h3>
 
 <p>Ubuntu or Debian users can simply run <code>apt-get install gimp</code> to
-get the latest stable release of GIMP.</p>
+get the latest stable release of GIMP. Ubuntu users can also install GIMP from <a href="https://apps.ubuntu.com/cat/applications/gimp/"; target="_blank">Software Centre</a>.</p>
 
 <h3>openSUSE</h3>
 <p>SUSE users can install GIMP by running <code>yast -i gimp</code> or