Bump bitsandbytes from 0.44.1 to 0.49.2

Bumps [bitsandbytes](https://github.com/bitsandbytes-foundation/bitsandbytes) from 0.44.1 to 0.49.2.
- [Release notes](https://github.com/bitsandbytes-foundation/bitsandbytes/releases)
- [Changelog](https://github.com/bitsandbytes-foundation/bitsandbytes/blob/main/CHANGELOG.md)
- [Commits](bitsandbytes-foundation/bitsandbytes@0.44.1...0.49.2)

---
updated-dependencies:
- dependency-name: bitsandbytes
  dependency-version: 0.49.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -228,7 +228,7 @@ ml-heavy = [
     "torchaudio==2.6.0",
     "numpy>=2.1,<2.2",
     "accelerate>=1.1.0",
-    "bitsandbytes==0.44.1",
+    "bitsandbytes==0.49.2",
     "datasets>=3.0.2",
     "transformers>=4.51.1,<=4.51.3",
     "tensorflow>=2.19.1",