JSON-RPC: Update for --jsonrpcbindip

[Rob-NY]

Short description of changes

Documentation for --jsonrpcbindip

Context: Fixes an issue? Related issues

Relates to PR #2917 in jamulus core.

Status of this Pull Request

What is missing until this pull request can be merged?

Translations

Does this need translation?

Probably, not sure.

Checklist

• [X] I've verified that this Pull Request follows the general code principles
• [X] I waited some time after this Pull Request was opened and all GitHub checks completed without errors.
• [X] I'm sure that this Pull Request goes to the correct branch

[ann0see]

Thank you very much!