Fix typo in code documentation

Change-Id: Ic9ae07a6bfa294df658e7c607d61977a5711db23
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/managers/test_bmc_ipv6.robot b/redfish/managers/test_bmc_ipv6.robot
index f606f7b..f343b01 100644
--- a/redfish/managers/test_bmc_ipv6.robot
+++ b/redfish/managers/test_bmc_ipv6.robot
@@ -41,7 +41,7 @@
 
 
 Get IPv6 Default Gateway And Verify
-    [Documentation]  Get IPv6 default gatway and verify.
+    [Documentation]  Get IPv6 default gateway and verify.
 
     ${resp}=  Redfish.Get  ${REDFISH_NW_ETH_IFACE}${ethernet_interface}
     ${ipv6_gateway}=  Get From Dictionary  ${resp.dict}  IPv6DefaultGateway