fix: correctly spell "miscellaneous" and added helm install-instructi…

…ons (#253)

README.md

@@ -6,6 +6,7 @@ Requirements:
 
 - [minikube](https://minikube.sigs.k8s.io/docs/start/)
 - [skaffold](https://skaffold.dev/docs/install/)
+- [helm](https://helm.sh/docs/intro/install/)
 - [yarn](https://yarnpkg.com/getting-started/install)
 
 **terminal 1:**
@@ -22,7 +23,7 @@ minikube start --kubernetes-version=v1.25.3 --cpus max --memory max && skaffold
 
 ```sh
 # It will end with keeping the terminal open for the tunnel.
-./scripts/miscallaneous.sh
+./scripts/miscellaneous.sh
 ```
 
 Now you can access the explorer at http://explorer-ui.localhost and also...