fix(docker): add VLABench undeclared deps (open3d, colorlog, sklearn)

VLABench's setup.py doesn't list all its imports. The env crashes
on `import open3d` at runtime. Add the missing runtime deps.

Made-with: Cursor

docker/Dockerfile.benchmark.vlabench

@@ -27,7 +27,9 @@ FROM huggingface/lerobot-gpu:latest
 # Asset download (Google Drive via gdown) is skipped — unreliable in CI and not
 # needed for our smoke test which uses its own eval pipeline.
 RUN git clone --depth 1 https://github.com/OpenMOSS/VLABench.git ~/VLABench && \
-    uv pip install --no-cache -e ~/VLABench mujoco==3.2.2 dm-control==1.0.22
+    uv pip install --no-cache -e ~/VLABench \
+      mujoco==3.2.2 dm-control==1.0.22 \
+      open3d==0.18.0 colorlog scikit-learn
 
 # Overlay the PR's source code on top of the nightly image.
 COPY --chown=user_lerobot:user_lerobot . .