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/text2vec.py

@@ -3,7 +3,7 @@
 from typing import Any, List, Optional
 
 from langchain_core.embeddings import Embeddings
-from pydantic import BaseModel
+from pydantic import BaseModel, ConfigDict
 
 
 class Text2vecEmbeddings(Embeddings, BaseModel):
@@ -33,6 +33,8 @@ class Text2vecEmbeddings(Embeddings, BaseModel):
     device: Optional[str] = None
     model: Any = None
 
+    model_config = ConfigDict(protected_namespaces=())
+
     def __init__(
         self,
         *,