lock vllm v0.5.1

Dockerfile

@@ -14,7 +14,7 @@ RUN pip3 install "torch==2.1.1"
 # This build is slow but NVIDIA does not provide binaries. Increase MAX_JOBS as needed.
 # RUN pip3 install "git+https://github.com/stanford-futuredata/megablocks.git"
 RUN pip3 install -U openai
-RUN pip3 install vllm==0.4.3
+RUN pip3 install vllm==0.5.1
 RUN pip3 install -U pydantic
 RUN pip3 install -U aioprometheus