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a2588d6c - Update openai embeddings notebook with correct embedding model in section 2 (#5831)

Update openai embeddings notebook with correct embedding model in section 2 (#5831) In second section it looks like a copy/paste from the first section and doesn't include the specific embedding model mentioned in the example so I added it for clarity. --------- Co-authored-by: Bagatur <baskaryan@gmail.com>