[Bugfix] Revert test_tokenization.py (#29729)

Signed-off-by: Jee Jee Li <pandaleefree@gmail.com>

Author: jeejeelee

tests/entrypoints/openai/test_tokenization.py

@@ -10,7 +10,7 @@
 from ...utils import RemoteOpenAIServer
 
 # any model with a chat template should work here
-MODEL_NAME = "Qwen/Qwen3-0.6B"
+MODEL_NAME = "HuggingFaceH4/zephyr-7b-beta"
 
 
 @pytest.fixture(scope="module")