chore(deps): bump deepspeed in /plugins/model/tts-cosevoice (#4128)

Bumps [deepspeed](https://github.com/deepspeedai/DeepSpeed) from 0.14.2 to 0.15.1.
- [Release notes](https://github.com/deepspeedai/DeepSpeed/releases)
- [Commits](https://github.com/deepspeedai/DeepSpeed/compare/v0.14.2...v0.15.1)

---
updated-dependencies:
- dependency-name: deepspeed
  dependency-type: direct:production
...

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plugins/model/tts-cosevoice/requirements.txt

 --extra-index-url https://download.pytorch.org/whl/cu118
 --extra-index-url https://download.pytorch.org/whl/cu118
 conformer==0.3.2
 conformer==0.3.2
-deepspeed==0.14.2; sys_platform == 'linux'
+deepspeed==0.15.1; sys_platform == 'linux'
 diffusers==0.27.2
 diffusers==0.27.2
 gdown==5.1.0
 gdown==5.1.0
 gradio==4.32.2
 gradio==4.32.2