Update to latest `elevenlabs-js` version for Gemini 3 flash support

[moyounishimself]

Hello!

@elevenlabs/elevenlabs-js package should be updated to v2.29.0. They added support to Gemini 3 flash (for reference: elevenlabs/elevenlabs-js#329)

Thanks.

[PennyroyalTea]

thanks for reporting! fixed in #51, will be included in latest release