chore(deps): Bump whisper-timestamped in /backend/python/openvoice

Bumps [whisper-timestamped](https://github.com/linto-ai/whisper-timestamped) from 1.14.2 to 1.15.6.
- [Release notes](https://github.com/linto-ai/whisper-timestamped/releases)
- [Commits](linto-ai/whisper-timestamped@v1.14.2...v1.15.6)

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

Signed-off-by: dependabot[bot] <[email protected]>

backend/python/openvoice/requirements-intel.txt

@@ -12,7 +12,7 @@ numpy==1.22.0
 eng_to_ipa==0.0.2
 inflect==7.0.0
 unidecode==1.3.7
-whisper-timestamped==1.14.2
+whisper-timestamped==1.15.6
 openai
 python-dotenv
 pypinyin==0.50.0