chore(deps): bump python-multipart in /plugins/model/pdf-mistral (#6323)

Bumps [python-multipart](https://github.com/Kludex/python-multipart) from 0.0.18 to 0.0.22.
- [Release notes](https://github.com/Kludex/python-multipart/releases)
- [Changelog](https://github.com/Kludex/python-multipart/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Kludex/python-multipart/compare/0.0.18...0.0.22)

---
updated-dependencies:
- dependency-name: python-multipart
  dependency-version: 0.0.22
  dependency-type: direct:production
...

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plugins/model/pdf-mistral/requirements.txt

@@ -2,7 +2,7 @@ fastapi==0.115.5
 uvicorn==0.32.1
 mistralai>=1.5.0
 PyMuPDF==1.24.14
-python-multipart==0.0.18
+python-multipart==0.0.22
 python-dotenv==1.0.1
 loguru==0.7.2
 requests==2.32.4