Update https://github.com/langchain-ai/docs/blob/main/src/oss/python/integrations/vectorstores/mongodb_atlas.mdx to remove OpenAI embeddings from the sample code and instead incorporate Embedding and Reranker API to highly Voyage.

# | output: false
# | echo: false
from langchain_openai import OpenAIEmbeddings

embeddings = OpenAIEmbeddings()

The above example should be replaced with a Voyage-based example