[Docs] Convert rST to MyST (Markdown) (#11145)

Signed-off-by: Rafael Vasquez <rafvasq21@gmail.com>

docs/source/serving/deploying_with_lws.md

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+(deploying-with-lws)=
+
+# Deploying with LWS
+
+LeaderWorkerSet (LWS) is a Kubernetes API that aims to address common deployment patterns of AI/ML inference workloads.
+A major use case is for multi-host/multi-node distributed inference.
+
+vLLM can be deployed with [LWS](https://github.com/kubernetes-sigs/lws) on Kubernetes for distributed model serving.
+
+Please see [this guide](https://github.com/kubernetes-sigs/lws/tree/main/docs/examples/vllm) for more details on
+deploying vLLM on Kubernetes using LWS.