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af97d58c - docs: update docs/integrations/retrievers/azure_ai_search.ipynb (#21160)

docs: update docs/integrations/retrievers/azure_ai_search.ipynb (#21160) This is a doc update. It fixes up formatting and product name references. The example code is updated to use a local built-in text file. @mmhangami Please take a look --------- Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>