[file-roller] Fix typo in help

[Alexandre Franke <afranke src gnome org>]

commit b1ca7bc0b8481a18bb998e360db1a497c59efaa1
Author: Alexandre Franke <alexandre franke gmail com>
Date:   Sat Sep 15 17:36:41 2012 +0200

    Fix typo in help

 help/C/supported-formats.page |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/C/supported-formats.page b/help/C/supported-formats.page
index 8988892..85e858c 100644
--- a/help/C/supported-formats.page
+++ b/help/C/supported-formats.page
@@ -22,7 +22,7 @@
 
   <title>Supported file formats</title>
 
-  <p>File formats that are support by <app>Archive Manager</app> include:</p>
+  <p>File formats that are supported by <app>Archive Manager</app> include:</p>
 
   <list type="numbered">
     <item><p>Archive only</p>