build(deps): bump youtube-transcript-api from 1.1.0 to 1.2.2 in /backend

Bumps [youtube-transcript-api](https://github.com/jdepoix/youtube-transcript-api) from 1.1.0 to 1.2.2.
- [Release notes](https://github.com/jdepoix/youtube-transcript-api/releases)
- [Commits](https://github.com/jdepoix/youtube-transcript-api/compare/v1.1.0...v1.2.2)

---
updated-dependencies:
- dependency-name: youtube-transcript-api
  dependency-version: 1.2.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

backend/requirements.txt

@@ -102,7 +102,7 @@ PyJWT[crypto]==2.10.1
 authlib==1.6.1
 
 black==25.1.0
-youtube-transcript-api==1.1.0
+youtube-transcript-api==1.2.2
 pytube==15.0.0
 
 pydub