Fix dead link on Networking page in Quick Start (#1843)

## Description

Switches a dead link to VividHosting's page about passive PoE to one
that actually works.

Fixes #1842.

## Meta

Merge checklist:
- [x] Pull Request title is [short, imperative
summary](https://cbea.ms/git-commit/) of proposed changes
- [x] The description documents the _what_ and _why_
- [ ] 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 settings back to v2024.3.1
- [ ] If this PR addresses a bug, a regression test for it is added

docs/source/docs/quick-start/networking.md

@@ -11,7 +11,7 @@ When using PhotonVision off robot, you _MUST_ plug the coprocessor into a physic
 :::{tab-item} New Radio (2025 - present)
 
 ```{danger}
-Ensure that the radio's DIP switches 1 and 2 are turned off; otherwise, the radio PoE feature may electrically destroy your coprocessor. [More info.](https://frc-radio.vivid-hosting.net/getting-started/passive-power-over-ethernet-poe-for-downstream-devices)
+Ensure that the radio's DIP switches 1 and 2 are turned off; otherwise, the radio PoE feature may electrically destroy your coprocessor. [More info.](https://frc-radio.vivid-hosting.net/overview/wiring-your-radio#power-over-ethernet-poe-for-downstream-devices)
 ```
 
 ```{image} images/networking-diagram-vividhosting.png