Add clarity to networking for multiple coprocs

[samfreund]

Description

What changed? Why? (the code + comments should speak for itself on the "how")

We've had a couple people who didn't find it clear that multiple coprocessors required different static IP addresses, so this PR aims to clarify that point in the docs.

Meta

Merge checklist:

• Pull Request title is short, imperative summary of proposed changes
• The description documents the what and why, including events that led to this PR
• If this PR changes behavior or adds a feature, user documentation is updated
• If this PR touches photon-serde, all messages have been regenerated and hashes have not changed unexpectedly
• If this PR touches configuration, this is backwards compatible with all settings going back to the previous seasons's last release (seasons end after champs ends)
• If this PR touches pipeline settings or anything related to data exchange, the frontend typing is updated
• If this PR addresses a bug, a regression test for it is added
• If this PR adds a dependency, the license has been checked for compatibility and steps taken to follow it

[Gold856]

The link actually doesn't point to any particular section. Seems to have changed as part of the VH radio change. We likely should also specifically call out the .6-.19 range, since I think those are reserved for static IPs and are never assigned via DHCP.