community[patch]: Fix missing protected_namespaces(). (#27610)

- [x] **PR message**:
- **Description:** Fixes warning messages raised due to missing
`protected_namespaces` parameter in `ConfigDict`.
    - **Issue:** https://github.com/langchain-ai/langchain/issues/27609
    - **Dependencies:** No dependencies
    - **Twitter handle:** @gawbul

libs/community/langchain_community/embeddings/nlpcloud.py

@@ -2,7 +2,7 @@ from typing import Any, Dict, List
 
 from langchain_core.embeddings import Embeddings
 from langchain_core.utils import get_from_dict_or_env, pre_init
-from pydantic import BaseModel
+from pydantic import BaseModel, ConfigDict
 
 
 class NLPCloudEmbeddings(BaseModel, Embeddings):
@@ -22,6 +22,8 @@ class NLPCloudEmbeddings(BaseModel, Embeddings):
     gpu: bool  # Define gpu as a class attribute
     client: Any  #: :meta private:
 
+    model_config = ConfigDict(protected_namespaces=())
+
     def __init__(
         self,
         model_name: str = "paraphrase-multilingual-mpnet-base-v2",