[Lint]Style: Convert example to ruff format (#5863)

### What this PR does / why we need it?
This PR fixes linting issues in the `example/` to align with the
project's Ruff configuration.

- vLLM version: v0.13.0
- vLLM main:
bde38c11df

Signed-off-by: root <root@LAPTOP-VQKDDVMG.localdomain>
Co-authored-by: root <root@LAPTOP-VQKDDVMG.localdomain>

examples/offline_inference_npu_tp2.py

@@ -37,11 +37,13 @@ def main():
     # Create a sampling params object.
     sampling_params = SamplingParams(max_tokens=100, temperature=0.0)
     # Create an LLM.
-    llm = LLM(model="deepseek-ai/DeepSeek-V2-Lite",
-              tensor_parallel_size=2,
-              enforce_eager=True,
-              trust_remote_code=True,
-              max_model_len=1024)
+    llm = LLM(
+        model="deepseek-ai/DeepSeek-V2-Lite",
+        tensor_parallel_size=2,
+        enforce_eager=True,
+        trust_remote_code=True,
+        max_model_len=1024,
+    )
 
     # Generate texts from the prompts.
     outputs = llm.generate(prompts, sampling_params)