[gimp-help-2] Fixed another small typo

[Marco Ciampa <marcoc src gnome org>]

commit 8ecfeb48acb77d5b78a2a1c7b28cf8aad0563a47
Author: Marco Ciampa <ciampix libero it>
Date:   Mon Jun 5 00:30:30 2017 +0200

    Fixed another small typo

 src/appendix/contributing.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/appendix/contributing.xml b/src/appendix/contributing.xml
index 638a551..88308b8 100644
--- a/src/appendix/contributing.xml
+++ b/src/appendix/contributing.xml
@@ -47,7 +47,7 @@
       </para>
       <para>
         If you have a GNOME account, the command is:
-        <emphasis>git clone ssh://yourusername>@git.gnome.org/git/gimp-help-2
+        <emphasis>git clone ssh://yourusername git gnome org/git/gimp-help-2
         </emphasis>.
       </para>
       <para>