docs: s/Exisiting/Existing/g (#5202) #3868

Job	Run time
format	52s
lint	49s
mypy (./packages/autogen-core)	3m 12s
mypy (./packages/autogen-magentic-one)	1m 19s
mypy (./packages/agbench)	58s
mypy (./packages/autogen-ext)	2m 45s
mypy (./packages/autogen-agentchat)	1m 37s
mypy (./packages/magentic-one-cli)	1m 34s
check-proto-changes-python	1m 7s
docs (./packages/autogen-core)	1m 39s
docs-example-check (./packages/autogen-core)	3m 0s
markdown-code-lint	2m 14s
samples-code-check	59s
pyright (./packages/autogen-core)	59s
pyright (./packages/autogen-magentic-one)	1m 0s
test (./packages/autogen-core)	58s
pyright (./packages/agbench)	1m 0s
pyright (./packages/autogen-ext)	1m 3s
pyright (./packages/autogen-agentchat)	55s
test (./packages/autogen-magentic-one)	1m 59s
pyright (./packages/magentic-one-cli)	1m 6s
test (./packages/autogen-ext)	24m 41s
test (./packages/autogen-agentchat)	1m 5s
codecov	0s
	56m 51s

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