Update cross-encoder model prefix (#6686)

Signed-off-by: Fanit Kolchina <[email protected]>

Author: kolchfa-aws

_ml-commons-plugin/pretrained-models.md

@@ -66,12 +66,12 @@ The following table provides a list of sparse encoding models and artifact links
 
 Cross-encoder models support query reranking. 
 
-The following table provides a list of cross-encoder models and artifact links you can use to download them. 
+The following table provides a list of cross-encoder models and artifact links you can use to download them. Note that you must prefix the model name with `huggingface/cross-encoders`, as shown in the **Model name** column. 
 
 | Model name | Version | TorchScript artifact | ONNX artifact |
 |:---|:---|:---|:---|
-| `ms-marco-MiniLM-L-6-v2` | 1.0.2 | - [model_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-6-v2/1.0.2/torch_script/cross-encoders_ms-marco-MiniLM-L-6-v2-1.0.2-torch_script.zip) <br>- [config_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-6-v2/1.0.2/torch_script/config.json) | - [model_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-6-v2/1.0.2/onnx/cross-encoders_ms-marco-MiniLM-L-6-v2-1.0.2-onnx.zip) <br>- [config_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-6-v2/1.0.2/onnx/config.json) |
-| `ms-marco-MiniLM-L-12-v2` | 1.0.2 | - [model_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-12-v2/1.0.2/torch_script/cross-encoders_ms-marco-MiniLM-L-12-v2-1.0.2-torch_script.zip) <br>- [config_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-12-v2/1.0.2/torch_script/config.json) | - [model_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-12-v2/1.0.2/onnx/cross-encoders_ms-marco-MiniLM-L-12-v2-1.0.2-onnx.zip) <br>- [config_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-12-v2/1.0.2/onnx/config.json) 
+| `huggingface/cross-encoders/ms-marco-MiniLM-L-6-v2` | 1.0.2 | - [model_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-6-v2/1.0.2/torch_script/cross-encoders_ms-marco-MiniLM-L-6-v2-1.0.2-torch_script.zip) <br>- [config_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-6-v2/1.0.2/torch_script/config.json) | - [model_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-6-v2/1.0.2/onnx/cross-encoders_ms-marco-MiniLM-L-6-v2-1.0.2-onnx.zip) <br>- [config_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-6-v2/1.0.2/onnx/config.json) |
+| `huggingface/cross-encoders/ms-marco-MiniLM-L-12-v2` | 1.0.2 | - [model_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-12-v2/1.0.2/torch_script/cross-encoders_ms-marco-MiniLM-L-12-v2-1.0.2-torch_script.zip) <br>- [config_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-12-v2/1.0.2/torch_script/config.json) | - [model_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-12-v2/1.0.2/onnx/cross-encoders_ms-marco-MiniLM-L-12-v2-1.0.2-onnx.zip) <br>- [config_url](https://artifacts.opensearch.org/models/ml-models/huggingface/cross-encoders/ms-marco-MiniLM-L-12-v2/1.0.2/onnx/config.json) 
 
 ## Prerequisites