Pico TTS not installable (Bullseye)

[LRitzdorf]

I'm currently going through a full reinstallation of the Voice Kit software on top of the newly-released Raspberry Pi OS Bullseye. I've followed the instructions in HACKING.md, and most of the setup proceeded as expected, with no significant errors. However, running any Python code that calls aiy.voice.tts.say() throws an error on the call to pico2wave, and upon further investigation, it looks like the libttspico-utils package isn't yet available for Bullseye.

For what it's worth, this is exactly the issue described in #119 (just for a different release). Would someone mind poking the Raspberry Pi team to add it, as happened last time?

Thanks in advance!