chore(deps): bump mlx-lm from 0.31.2 to 0.31.3 in /cmd/runtimes/mlx

Bumps [mlx-lm](https://github.com/ml-explore/mlx-lm) from 0.31.2 to 0.31.3.
- [Release notes](https://github.com/ml-explore/mlx-lm/releases)
- [Commits](ml-explore/mlx-lm@v0.31.2...v0.31.3)

---
updated-dependencies:
- dependency-name: mlx-lm
  dependency-version: 0.31.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

cmd/runtimes/mlx/requirements.txt

@@ -1,6 +1,6 @@
 # MLX libraries.
 mlx[cuda]==0.30.6
 mlx-data==0.1.0
-mlx-lm==0.31.2
+mlx-lm==0.31.3
 # HuggingFace libraries.
 datasets==4.8.4