feat(formatting): `black[jupyter]` (#6732)

docs/examples/agent/openai_agent.ipynb

docs/examples/agent/openai_agent_context_retrieval.ipynb

docs/examples/agent/openai_agent_query_cookbook.ipynb

docs/examples/agent/openai_agent_query_plan.ipynb

docs/examples/agent/openai_agent_retrieval.ipynb

docs/examples/agent/openai_agent_with_query_engine.ipynb

docs/examples/analysis/PlaygroundDemo.ipynb

docs/examples/analysis/TokenPredictor.ipynb

docs/examples/callbacks/LlamaDebugHandler.ipynb

docs/examples/callbacks/TokenCountingHandler.ipynb

docs/examples/callbacks/WandbCallbackHandler.ipynb

.../examples/chat_engine/chat_engine_condense_question.ipynb

docs/examples/chat_engine/chat_engine_react.ipynb

docs/examples/chat_engine/chat_engine_repl.ipynb

docs/examples/citation/pdf_page_reference.ipynb

...examples/composable_indices/ComposableIndices-Prior.ipynb

...mples/composable_indices/ComposableIndices-Weaviate.ipynb

docs/examples/composable_indices/ComposableIndices.ipynb

...sable_indices/city_analysis/City_Analysis-Decompose.ipynb

...e_indices/city_analysis/City_Analysis-Unified-Query.ipynb