fix: recursion error when a bad URI was configured in node:

[antazoey]

What I did

I put in a very non-URI value in my config to demo something and it blew up not how i expected.
This PR fixes it.

How I did it

Noticed a comment was wrong, that was where to fix.
Basically make it error if given a value that is neither HTTP, WS, or IPC.

How to verify it

node:
  ethereum:
    mainnet:
      uri: asdfasdf

ape console --network ethereum:mainnet:node

Before, it would recurse until it failed.
Now, you get:

ERROR:    (ConfigError) Invalid URI (not HTTP, WS, or IPC): asdfasdf

Checklist

• All changes are completed
• New test cases have been added
• Documentation has been updated