[CI] Fix lint in CI (#1712)

### What this PR does / why we need it?
Fix lint in CI
- vLLM version: v0.9.1
- vLLM main:
vllm-project/vllm@49e8c7e

Signed-off-by: MengqingCao <cmq0113@163.com>

Author: MengqingCao

examples/offline_inference_npu_v1.py

@@ -17,14 +17,14 @@
 # limitations under the License.
 #
 
+# isort: skip_file
 import os
 
 os.environ["VLLM_USE_MODELSCOPE"] = "True"
 os.environ["VLLM_WORKER_MULTIPROC_METHOD"] = "spawn"
 
 from vllm import LLM, SamplingParams
 
-
 if __name__ == "__main__":
     prompts = [
         "Hello, my name is",