build(deps): bump starlette from 0.49.1 to 0.50.0 (#332)

Bumps [starlette](https://github.com/Kludex/starlette) from 0.49.1 to 0.50.0.
- [Release notes](https://github.com/Kludex/starlette/releases)
- [Changelog](https://github.com/Kludex/starlette/blob/main/docs/release-notes.md)
- [Commits](Kludex/starlette@0.49.1...0.50.0)

---
updated-dependencies:
- dependency-name: starlette
  dependency-version: 0.50.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 aiofiles==24.1.0
 Jinja2==3.1.6
 python-multipart==0.0.20
-starlette==0.49.1
+starlette==0.50.0
 uvicorn[standard]==0.34.2; platform_machine == 'x86_64'
 uvicorn==0.34.3; platform_machine != 'x86_64'
 yt-dlp[default]==2025.12.08