Docs update config to allow access to rpc from external ip on specific port using hostname flag

[AwaisBinKaleem]

• Because this PR includes a bug fix, relevant tests have been included.
• Because this PR includes a new feature, the change was previously discussed on an Issue or with someone from the team.
• added hostname flag in docs that was not available in docs.

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Name	Status	Preview	Comments	Updated (UTC)
hardhat	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 13, 2024 11:56pm

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[alcuadrado]

Thanks! I just updated this a bit to make it more correct with how it works.

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