Fix CLI parameter documentation inconsistency in pooling_models.md (vllm-project#23630)

Author: oneraghavan

docs/models/pooling_models.md

@@ -205,12 +205,12 @@ Our [OpenAI-Compatible Server](../serving/openai_compatible_server.md) provides
 
 There is currently no official interface for specifying support for Matryoshka Embeddings. In vLLM, if `is_matryoshka` is `True` in `config.json,` it is allowed to change the output to arbitrary dimensions. Using `matryoshka_dimensions` can control the allowed output dimensions.
 
-For models that support Matryoshka Embeddings but not recognized by vLLM, please manually override the config using `hf_overrides={"is_matryoshka": True}`, `hf_overrides={"matryoshka_dimensions": [<allowed output dimensions>]}` (offline) or `--hf_overrides '{"is_matryoshka": true}'`,  `--hf_overrides '{"matryoshka_dimensions": [<allowed output dimensions>]}'`(online).
+For models that support Matryoshka Embeddings but not recognized by vLLM, please manually override the config using `hf_overrides={"is_matryoshka": True}`, `hf_overrides={"matryoshka_dimensions": [<allowed output dimensions>]}` (offline) or `--hf-overrides '{"is_matryoshka": true}'`,  `--hf-overrides '{"matryoshka_dimensions": [<allowed output dimensions>]}'`(online).
 
 Here is an example to serve a model with Matryoshka Embeddings enabled.
 
 ```text
-vllm serve Snowflake/snowflake-arctic-embed-m-v1.5 --hf_overrides '{"matryoshka_dimensions":[256]}'
+vllm serve Snowflake/snowflake-arctic-embed-m-v1.5 --hf-overrides '{"matryoshka_dimensions":[256]}'
 ```
 
 ### Offline Inference