Correct typo

Correct typo - suggested by Sandor.

Signed-off-by: Alex Ellis <[email protected]>

docs/tutorials/kubernetes-hpa.md

@@ -190,7 +190,7 @@ horizontalpodautoscaler.autoscaling/nodeinfo autoscaled
 
 View the HPA record with:
 
-```
+```sh
 kubectl get hpa/nodeinfo -n openfaas-fn
 
 NAME       REFERENCE             TARGETS         MINPODS   MAXPODS   REPLICAS   AGE
@@ -203,7 +203,7 @@ kubectl get hpa/nodeinfo -n openfaas-fn -o yaml
 
 You can use `kubectl describe hpa/nodeinfo -n openfaas-fn` to get detailed information including any events such as scaling up and down.
 
-```
+```sh
 kubectl describe hpa/nodeinfo -n openfaas-fn
 
 Name:                                                  nodeinfo
@@ -230,7 +230,7 @@ Events:           <none>
 
 Use the following command with hey
 
-```
+```sh
 export OPENFAAS_URL=http://127.0.0.1:31112
 
 hey -c 5 \
@@ -245,23 +245,23 @@ You should note that HPA is designed to react slowly to changes in traffic, both
 
 Now in a new window monitor the progress:
 
-```
+```sh
 kubectl describe hpa/nodeinfo -n openfaas
 ```
 
 Or in an automated fashion:
 
-```
+```sh
 # watch -n 5 "kubectl describe hpa/nodeinfo -n openfaas-fn"
 ```
 
 You can also monitor the replicas of your function in the OpenFaaS UI or via the CLI:
 
-```
+```sh
 watch -n 5 "faas-cli list"
 ```
 
-Here is ane example of the replicas scaling up in response to the traffic created by `hey`:
+Here is an example of the replicas scaling up in response to the traffic created by `hey`:
 
 ```sh
 Name:                                                  nodeinfo