Fix Kubernetes docs

[errordeveloper]

No description provided.

[errordeveloper]

One takeaway I thin is to consider that Scope simply deserves it's own namespace.

Also, do consider what if we did infer the namespace, and user specifies --namespace=myscope-namespace?

[2opremio]

@errordeveloper Again, Scope needs to run in the same namespace as kube-dns for #1433 to work

[errordeveloper]

For the record, the service doesn't depend on DNS and simply uses:

$(WEAVESCOPE_APP_SERVICE_HOST):$(WEAVESCOPE_APP_SERVICE_PORT)

I will switch all the things default namespace, which was what I was thinking to do eventually anyway, but did this due to the lack of input on #1475.