[CI/Build] fix doc build warning: Failed to get 'name: description' pair (vllm-project#25733)

Signed-off-by: yiting.jiang <yiting.jiang@daocloud.io>

Author: yitingdc

vllm/v1/spec_decode/ngram_proposer.py

@@ -71,8 +71,8 @@ def batch_propose(
         Args:
             valid_ngram_requests: 
                 Set of indices of requests that need ngram proposals.
-                num_tokens_no_spec: 
-            Numpy array of shape (batch_size,) representing the number 
+            num_tokens_no_spec: 
+                Numpy array of shape (batch_size,) representing the number 
                 of tokens without speculative tokens for each request.
             token_ids_cpu: 
                 Numpy array of shape (batch_size, max_model_len)