Bump deepspeed from 0.8.3 to 0.15.1

Bumps [deepspeed](https://github.com/microsoft/DeepSpeed) from 0.8.3 to 0.15.1.
- [Release notes](https://github.com/microsoft/DeepSpeed/releases)
- [Commits](microsoft/DeepSpeed@v0.8.3...v0.15.1)

---
updated-dependencies:
- dependency-name: deepspeed
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

setup.py

@@ -155,7 +155,7 @@ def package_files(prefix: str, directory: str, extension: str):
 
 extra_deps['deepspeed'] = [
     'numpy<2',
-    'deepspeed==0.8.3',
+    'deepspeed==0.15.1',
     'pydantic>=1.0,<2',
 ]