Add support for configurable embedding model (#1627)

Co-authored-by: Dev Khant <devkhant24@gmail.com>

mem0/embeddings/openai.py

@@ -1,10 +1,10 @@
 from typing import Optional
+
 from openai import OpenAI
 
 from mem0.configs.embeddings.base import BaseEmbedderConfig
 from mem0.embeddings.base import EmbeddingBase
 
-
 class OpenAIEmbedding(EmbeddingBase):
     def __init__(self, config: Optional[BaseEmbedderConfig] = None):
         super().__init__(config)
@@ -28,7 +28,10 @@ class OpenAIEmbedding(EmbeddingBase):
         """
         text = text.replace("\n", " ")
         return (
-            self.client.embeddings.create(input=[text], model=self.config.model)
+            self.client.embeddings.create(
+                input=[text], 
+                model=self.config.model
+            )
             .data[0]
             .embedding
         )