Docs update request: /run-arbitrum-node/run-full-node

[pearring]

Source: https://docs.arbitrum.io/run-arbitrum-node/run-full-node

Request: (how can we help?)

GM! The title seems to include a typo as worded: "How to run a full node for an Arbitrum or Arbitrum chain"

I would expect to read" How to run a full node for an Arbitrum chain" or something similar.

Psst, this issue will be closed with a templated response if it isn't a documentation update request.

[anegg0]

Thanks for the nudge, @pearring!
We're trying to fix this:
#2839