build(deps): bump python-multipart from 0.0.7 to 0.0.18 in /Backend

Bumps [python-multipart](https://github.com/Kludex/python-multipart) from 0.0.7 to 0.0.18.
- [Release notes](https://github.com/Kludex/python-multipart/releases)
- [Changelog](https://github.com/Kludex/python-multipart/blob/master/CHANGELOG.md)
- [Commits](Kludex/python-multipart@0.0.7...0.0.18)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Backend/requirements.txt

@@ -1,7 +1,7 @@
 fastapi==0.109.1
 python-dotenv==0.21.0
 python-jose==3.3.0
-python-multipart==0.0.7
+python-multipart==0.0.18
 requests==2.32.0
 librosa==0.10.0.post2
 pymongo==4.8.0