Fix avatars failing to be set on XMPP accounts

There's a stray `end` that prematurely closes the class

app/services/ejabberd_manager/set_avatar.rb

@@ -25,9 +25,8 @@ module EjabberdManager
         raise res.inspect if res.status != 200
       end
     end
-  end
 
-  private
+    private
 
     def process_avatar
       @user.avatar.blob.open do |file|
@@ -77,4 +76,5 @@ module EjabberdManager
         """.strip,
       ]
     end
+  end
 end