[bugfix] fix typo of _skip_all_reduce_across_dp_group (#5435)

### What this PR does / why we need it?
 fix typo of _skip_all_reduce_across_dp_group
### Does this PR introduce _any_ user-facing change?
no

### How was this patch tested?
- vLLM version: release/v0.13.0
- vLLM main:
81786c8774

Signed-off-by: jiangkuaixue123 <jiangxiaozhou111@163.com>

vllm_ascend/worker/model_runner_v1.py

@@ -397,7 +397,7 @@ class NPUModelRunner(GPUModelRunner):
     def _use_aclgraph(self) -> bool:
         return self.compilation_config.cudagraph_mode != CUDAGraphMode.NONE and self.compilation_config.mode == CompilationMode.VLLM_COMPILE and not self.model_config.enforce_eager
 
-    def _skip_all_reduce_acorss_dp_group(self) -> bool:
+    def _skip_all_reduce_across_dp_group(self) -> bool:
         """
         Decide whether to skip the all-reduce across the data-parallel (DP) group.
 
@@ -446,7 +446,7 @@ class NPUModelRunner(GPUModelRunner):
         if self.dp_size == 1:
             return num_tokens, None, with_prefill
 
-        if self._skip_all_reduce_acorss_dp_group():
+        if self._skip_all_reduce_across_dp_group():
             num_tokens_after_padding = torch.tensor([num_tokens] *
                                                     self.dp_size,
                                                     device="cpu",