[BugFix] Fix tensorizer extra in setup.py (vllm-project#4072)

Author: njhill

setup.py

@@ -429,7 +429,7 @@ def get_extra_requirements() -> dict:
     extras_require=get_extra_requirements(),
     ext_modules=ext_modules,
     extras_require={
-        "optional": ["tensorizer==2.9.0a1"],
+        "tensorizer": ["tensorizer==2.9.0a1"],
     },
     cmdclass={"build_ext": cmake_build_ext} if not _is_neuron() else {},
     package_data=package_data,