Fix Robot keyword typo error in systest

Change-Id: I5291dd5e4c435e09c006d7fa6ddf13b49720ad56
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/systest/gpu_stress_test.robot b/systest/gpu_stress_test.robot
index 93df4ba..f2f9ad8 100755
--- a/systest/gpu_stress_test.robot
+++ b/systest/gpu_stress_test.robot
@@ -109,7 +109,7 @@
     Rpvars  power  power_max  temperature  temperature_max  clock  clock_max
     Run Keyword If  ${power} > ${power_max}  Fail
     ...  msg=GPU Power ${power} exceeds limit of ${power_max}.
-    ${errmsg}=  Canenate  GPU temperature of ${temperature} exceeds limit
+    ${errmsg}=  Catenate  GPU temperature of ${temperature} exceeds limit
     ...  of ${temperature_max}.
     Run Keyword If  ${temperature} > ${temperature_max}  Fail  msg=${errmsg}
     Run Keyword If  ${clock} > ${clock_max}  Fail