Bump ctranslate2 from 4.4.0 to 4.5.0

Bumps [ctranslate2](https://github.com/OpenNMT/CTranslate2) from 4.4.0 to 4.5.0.
- [Release notes](https://github.com/OpenNMT/CTranslate2/releases)
- [Changelog](https://github.com/OpenNMT/CTranslate2/blob/master/CHANGELOG.md)
- [Commits](OpenNMT/CTranslate2@v4.4.0...v4.5.0)

---
updated-dependencies:
- dependency-name: ctranslate2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/prod.txt

@@ -1,5 +1,5 @@
 colorlog==6.9.0
-ctranslate2==4.4.0
+ctranslate2==4.5.0
 fastapi==0.115.5
 gunicorn==23.0.0
 httpx==0.28.0