Update supported vLLM version to v0.6.4.post2 to support Gaudi 1.19

Author: vaibhavjainwiz

pyproject.toml

@@ -26,7 +26,7 @@ classifiers = [
 requires-python = ">=3.9"
 dynamic = ["version"]
 dependencies = [
-  "vllm>=0.6.6.post1",
+  "vllm>=0.6.4.post2",
   "prometheus_client==0.21.0",
   "grpcio==1.67.0",
   "grpcio-health-checking==1.62.2",