langchain

23fc7c8c - docs [patch] : fix import to use community path for handler in fiddler notebook (#18140)

docs [patch] : fix import to use community path for handler in fiddler notebook (#18140) **Description:** Update the example fiddler notebook to use community path, instead of langchain.callback **Dependencies:** None **Twitter handle:** @bhalder Co-authored-by: Barun Halder <barun@fiddler.ai>