Update switcher versions and make 0.4.0 stable #3297

Job	Run time
pyright (./packages/autogen-core)	1m 10s
pyright (./packages/autogen-magentic-one)	56s
format	59s
pyright (./packages/agbench)	1m 7s
codecov (./packages/autogen-core)	1m 0s
pyright (./packages/autogen-ext)	56s
codecov (./packages/autogen-magentic-one)	2m 11s
pyright (./packages/autogen-agentchat)	1m 5s
codecov (./packages/autogen-ext)	2m 46s
lint	47s
mypy (./packages/autogen-core)	2m 6s
codecov (./packages/autogen-agentchat)	1m 3s
pyright (./packages/magentic-one-cli)	1m 0s
mypy (./packages/autogen-magentic-one)	1m 18s
mypy (./packages/agbench)	1m 3s
test (./packages/autogen-core)	51s
mypy (./packages/autogen-ext)	1m 57s
test (./packages/autogen-magentic-one)	1m 20s
mypy (./packages/autogen-agentchat)	1m 4s
test (./packages/autogen-ext)	2m 49s
mypy (./packages/magentic-one-cli)	53s
test (./packages/autogen-agentchat)	54s
check-proto-changes-python	1m 24s
docs (./packages/autogen-core)	1m 37s
docs-example-check (./packages/autogen-core)	2m 43s
markdown-code-lint	1m 54s
samples-code-check	1m 2s
	37m 55s

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