chore(uv): more locking fixes for macos (#309)

* Address more locking failure modes for dependabot

---------

Signed-off-by: Matt Kornfield <mkornfield@nvidia.com>
Co-authored-by: Kendrick Boyd <kendrickb@nvidia.com>

Author: mckornfield

pyproject.toml

@@ -133,9 +133,9 @@ cpu = [
   "transformers==4.57.3",
   "triton>=2.0.0; sys_platform=='linux'",
   "trl>=0.23.0",
-  "unsloth[cu128-torch291]==2025.12.4",
-  "unsloth_zoo==2025.12.4",
-  "vllm==0.15.0",
+  "unsloth[cu128-torch291]==2025.12.4; sys_platform=='linux'",
+  "unsloth_zoo==2025.12.4; sys_platform=='linux'",
+  "vllm==0.15.0; sys_platform=='linux'",
 ]
 
 cu128 = [