Fix robot test case syntax warning

Change-Id: I9cce6a86927a38ff129c9ce2fe280c380480cd52
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/managers/test_bmc_network_mac.robot b/redfish/managers/test_bmc_network_mac.robot
index 0f3ec5b..1fc0860 100644
--- a/redfish/managers/test_bmc_network_mac.robot
+++ b/redfish/managers/test_bmc_network_mac.robot
@@ -91,7 +91,7 @@
     ${special_char_mac}  error
     ${less_byte_mac}     error
 
- Configure Invalid MAC And Verify Persistency On FW_Env
+Configure Invalid MAC And Verify Persistency On FW_Env
     [Documentation]  Configure invalid MAC and verify persistency on FW_Env.
     [Tags]  Configure_Invalid_MAC_And_Verify_Persistency_On_FW_Env