Describe the requested update
A customer provided some nice feedback for the following URL: https://developer.signalwire.com/voice/tts/cartesia

"Near the top is this paragraph and both the links in it go to dead pages:

Consult Cartesia's Text-to-Speech documentation for more information and audio samples for available voices. Create a Cartesia Account to browse and test voices in the Cartesia Playground.

Those links to go to:
https://docs.cartesia.ai/build-with-cartesia/models-tts

https://developer.signalwire.com/voice/tts/play.cartesia.ai

Tech Note:
You may want to change the text that currently says: "Copy the voice ID from the below table:"
... to instead say "Copy the voice ID from the below table or directly from the Cartesia site."