[gtk+] Fix a link

[Matthias Clasen <matthiasc src gnome org>]

commit 1473db7f1e414358ffaa0aad56789bab7a1155e9
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Mar 30 17:37:06 2012 -0400

    Fix a link
    
    As pointed out in bug 673139, the link to the mailing list
    information page was outdated.

 README.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/README.in b/README.in
index 28cb004..8811835 100644
--- a/README.in
+++ b/README.in
@@ -19,7 +19,7 @@ The official web site is:
   http://www.gtk.org/
 
 Information about mailing lists can be found at
-  http://www.gtk.org/mailing-lists.html
+  http://www.gtk.org/mailing-lists.php
 
 
 Installation