typo fix

patchwork/templates/patchwork/bundles.html

@@ -56,7 +56,7 @@ <h1>Bundles</h1>
   Bundles are groups of related patches. You can create bundles by
   selecting patches from a project, then using the 'create bundle' form
   to give your bundle a name. Each bundle can be public or private; public
-  bundles are given a persistent URL, based you your username and the name
+  bundles are given a persistent URL, based on your username and the name
   of the bundle. Private bundles are only visible to you.
 </p>