docs: clarify meaning of 'index' field in annotation models (fixes #2512)#2751

Navadeep0007 wants to merge 1 commit intoopenai:mainopenai/openai-python:mainfrom

Navadeep0007:docs/fix-vector-store-docsNavadeep0007/openai-python:docs/fix-vector-store-docsCopy head branch name to clipboard