fix(NodesTable.tsx): change name column label to host
fix(NodesTable.tsx): change name column label to host

Changes the "Name" column to "Host". This makes it less
confusing for the user.

Closes DCOS-40037

dcos/dcos-ui,dcos/dcos-ui,dcos/dcos-ui,dcos/dcos-ui,dcos/dcos-ui