update langchain huggingface embedding

this is causing the no content generation when google/huggingace are used as llm/embedding models

gpt_researcher/memory/embeddings.py

@@ -44,7 +44,7 @@ def __init__(self, embedding_provider, headers=None, **kwargs):
                     deployment=os.environ["AZURE_EMBEDDING_MODEL"], chunk_size=16
                 )
             case "huggingface":
-                from langchain.embeddings import HuggingFaceEmbeddings
+                from langchain_huggingface import HuggingFaceEmbeddings
 
                 # Specifying the Hugging Face embedding model all-MiniLM-L6-v2
                 _embeddings = HuggingFaceEmbeddings(