docs: enhance agents.ipynb with parallel tool calls section (#5088) #3594

Job	Run time
mypy (./packages/autogen-core)	2m 35s
mypy (./packages/autogen-magentic-one)	1m 16s
format	51s
mypy (./packages/agbench)	1m 6s
mypy (./packages/autogen-ext)	2m 2s
mypy (./packages/autogen-agentchat)	1m 22s
mypy (./packages/magentic-one-cli)	1m 21s
codecov (./packages/autogen-core)	1m 2s
docs (./packages/autogen-core)	1m 39s
codecov (./packages/autogen-magentic-one)	1m 51s
codecov (./packages/autogen-ext)	3m 26s
codecov (./packages/autogen-agentchat)	1m 7s
docs-example-check (./packages/autogen-core)	2m 48s
lint	58s
markdown-code-lint	2m 2s
pyright (./packages/autogen-core)	56s
pyright (./packages/autogen-magentic-one)	1m 5s
samples-code-check	1m 9s
pyright (./packages/agbench)	54s
test (./packages/autogen-core)	55s
pyright (./packages/autogen-ext)	58s
test (./packages/autogen-magentic-one)	1m 33s
test (./packages/autogen-ext)	2m 57s
pyright (./packages/autogen-agentchat)	1m 20s
check-proto-changes-python	1m 3s
test (./packages/autogen-agentchat)	1m 7s
pyright (./packages/magentic-one-cli)	1m 2s
	40m 25s

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