livekit-agents@1.6.4

## What's Changed

### Bug fixes

**Turn Detector**
* disable retry for eot errors by @chenghao-mou in https://github.com/livekit/agents/pull/6195
* disable eot connection error retry too by @chenghao-mou in https://github.com/livekit/agents/pull/6196

**Turn handling/committing**
* fix(agents): keep STT input anchor on the pipeline across handoff by @chenghao-mou in https://github.com/livekit/agents/pull/6207 

>[!WARNING]
> users are advised to upgrade if you use agent handoff with STT and are on 1.5.14 ~ 1.6.3

### Other updates

**Core**
* chore(deps): update livekit dependency by @chenghao-mou in https://github.com/livekit/agents/pull/6194
* chore(example): update otel trace example by @chenghao-mou in https://github.com/livekit/agents/pull/6178
* chore(dep): update local-inference dep by @chenghao-mou in https://github.com/livekit/agents/pull/6214
* update livekit version by @chenghao-mou in https://github.com/livekit/agents/pull/6217
* Hotel Receptionist Scenario Expansion by @ShayneP in https://github.com/livekit/agents/pull/6186

**Plugins**
* chore(elevenlabs): update `language_code` doc to remove error case by @inickt in https://github.com/livekit/agents/pull/6197
* (xai realtime): set text modality by @tinalenguyen in https://github.com/livekit/agents/pull/6198
* fix(google): clean up STT input frame task by @gyx09212214-prog in https://github.com/livekit/agents/pull/6193
* feat: add Protoface avatar plugin by @protoface-team in https://github.com/livekit/agents/pull/6164

**Version update** 
* livekit-agents@1.6.4 by @github-actions[bot] in https://github.com/livekit/agents/pull/6218

## New Contributors
* @gyx09212214-prog made their first contribution in https://github.com/livekit/agents/pull/6193
* @protoface-team made their first contribution in https://github.com/livekit/agents/pull/6164

**Full Changelog**: https://github.com/livekit/agents/compare/livekit-agents@1.6.3...livekit-agents@1.6.4