docs: update setup runner

[zhyncs]

Motivation

as titled

Modification

as titled

Checklist

1. Ensure pre-commit pre-commit run --all-files or other linting tools are used to fix potential lint issues.
2. Confirm that modifications are covered by complete unit tests. If not, please add more unit tests for correctness.
3. Modify documentation as needed, such as docstrings or example tutorials.

[Ying1123]

You can import the model name from a common variable

sglang/test/lang/test_srt_backend.py

Line 25 in e1c4341

cls.backend = sgl.Runtime(model_path=MODEL_NAME_FOR_TEST)

[zhyncs]

ok

[zhyncs]

You can import the model name from a common variable

sglang/test/lang/test_srt_backend.py

Line 25 in e1c4341

cls.backend = sgl.Runtime(model_path=MODEL_NAME_FOR_TEST)

fixed in #891