Fix typo in test documentation

Change-Id: If779915531e6431f018663ce87964fb07741b2fa
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/utils.robot b/lib/utils.robot
index 038dfba..974e5d4 100755
--- a/lib/utils.robot
+++ b/lib/utils.robot
@@ -970,7 +970,7 @@
     [Arguments]  ${milliseconds}=1000
 
     # Description of argument(s):
-    # miliseconds      Time interval for watchdog timer
+    # milliseconds     Time interval for watchdog timer
 
     ${cmd}=  Catenate  busctl set-property xyz.openbmc_project.Watchdog
     ...                /xyz/openbmc_project/watchdog/host0