Fix typo in the code documentation

Changes:
    - Spelling correction

Tested:
    - NA
Change-Id: I43cf98dbf25cc8ccc205ad52b3082012e2ca8262
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/gui/gui_test/settings_menu/test_network_sub_menu.robot b/gui/gui_test/settings_menu/test_network_sub_menu.robot
index 1f1d2ac..cf7ac02 100644
--- a/gui/gui_test/settings_menu/test_network_sub_menu.robot
+++ b/gui/gui_test/settings_menu/test_network_sub_menu.robot
@@ -422,7 +422,7 @@
     [Arguments]  ${ipv6_static_def_gw}  ${expected_status}=error
 
     # Description of argument(s):
-    # ipv6_static_def_gw  IPv6 static default gatway.
+    # ipv6_static_def_gw  IPv6 static default gateway.
     # expected_status     Expected status (Success or Fail).
 
     Wait Until Element Is Enabled  ${xpath_add_static_def_gateway_button}  timeout=60sec