fix access openai.Embedding no longer supported in openai>=1.0.0

[cat-mia]

I have followed the tutorial to build a vector index for my Neo4j instance using OpenAI version 1.42.0.
However, during the embedding process(openai_embeddings.py), I encountered the following message:

You tried to access openai.Embedding, but this is no longer supported in openai>=1.0.0 - see the README at https://github.com/openai/openai-python for the API.
You can run openai migrate to automatically upgrade your codebase to use the 1.0.0 interface.
Alternatively, you can pin your installation to the old version, e.g. pip install openai==0.28

I downgraded my OpenAI version to 0.28, which resolved the issue.