Bump elevenlabs from 0.2.17 to 0.2.21

Bumps [elevenlabs](https://github.com/elevenlabs/elevenlabs-python) from 0.2.17 to 0.2.21.
- [Release notes](https://github.com/elevenlabs/elevenlabs-python/releases)
- [Commits](https://github.com/elevenlabs/elevenlabs-python/compare/v0.2.17...v0.2.21)

---
updated-dependencies:
- dependency-name: elevenlabs
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -19,5 +19,5 @@ spacy==3.5.3
 torch==2.0.1
 transformers==4.29.2
 ffmpeg-python==0.2.0
-elevenlabs==0.2.17
+elevenlabs==0.2.21
 yt-dlp==2023.3.4