Fix typo in helm install output message

[danbev]

There is a minor typo in the Notes: (SAMPPLE_NODE_IP):

$ helm install nodeserver --set image.repository=localhost:5000/nodeserver  chart/nodeserver
NAME: nodeserver
LAST DEPLOYED: Mon Aug 15 14:57:21 2022
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
Congratulations, you have deployed your Node.js Application to Kubernetes using Helm!

To verify your application is running, run the following two commands to set the SAMPLE_NODE_PORT and SAMPPLE_NODE_IP environment variables to the location of your application:

export SAMPLE_NODE_PORT=$(kubectl get --namespace default -o jsonpath="{.spec.ports[0].nodePort}" services nodeserver-service)
export SAMPLE_NODE_IP=$(kubectl get nodes --namespace default -o jsonpath="{.items[0].status.addresses[0].address}")

And then open your web browser to http://${SAMPLE_NODE_IP}:${SAMPLE_NODE_PORT}" from the command line, eg:

open http://${SAMPLE_NODE_IP}:${SAMPLE_NODE_PORT}