Code spell fix in test documentation

Change-Id: I60daa783166de4c8a01c25fd56da61ab0c37daa9
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/gui/test/users/test_obmc_gui_manage_user.robot b/gui/test/users/test_obmc_gui_manage_user.robot
index be1694b..92212c2 100644
--- a/gui/test/users/test_obmc_gui_manage_user.robot
+++ b/gui/test/users/test_obmc_gui_manage_user.robot
@@ -55,7 +55,7 @@
 
 
 Verify Existence Of All Button In User Page
-    [Documentation]  Verify existence of all botton in user page.
+    [Documentation]  Verify existence of all button in user page.
     [Tags]  Verify_Existence_Of_All_Button_In_User_Page
 
     # Buttons under user account properties