add numpy to realtime proj deps

Author: jhills20

pyproject.toml

@@ -37,7 +37,7 @@ Repository = "https://github.com/openai/openai-agents-python"
 voice = ["numpy>=2.2.0, <3; python_version>='3.10'", "websockets>=15.0, <16"]
 viz = ["graphviz>=0.17"]
 litellm = ["litellm>=1.67.4.post1, <2"]
-realtime = ["websockets>=15.0, <16"]
+realtime = ["numpy>=2.2.0, <3; python_version>='3.10'", "websockets>=15.0, <16"]
 
 [dependency-groups]
 dev = [