Add elevenlabs speed parameter

[MatthiasGruba]

Elevenlabs added a speed parameter in the last release: https://elevenlabs.io/docs/changelog/2025/2/25#text-to-speech

[changeset-bot]

🦋 Changeset detected

Latest commit: c793075

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
livekit-plugins-elevenlabs	Patch

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[jayeshp19]

Thanks for contribution @MatthiasGruba , can you run ruff format . and also add changeset?

[davidzhao]

we should also expose this in update_settings here

[MatthiasGruba]

we should also expose this in update_settings here

I'm not sure if I understood this correctly - the speed is part of the voice which can be updated with this method?

[MatthiasGruba]

Thanks for contribution @MatthiasGruba , can you run ruff format . and also add changeset?

Done and added! First contribution here so let me know if that was correct!

[davidzhao]

we should also expose this in update_settings here

I'm not sure if I understood this correctly - the speed is part of the voice which can be updated with this method?

my apologies. it's already part of the Voice parameter. ignore me :)