Update all versions to 0.4.0 #3183

Job	Run time
format	56s
lint	59s
codecov (./packages/autogen-core)	1m 5s
docs (./packages/autogen-core)	1m 26s
codecov (./packages/autogen-magentic-one)	1m 17s
docs-example-check (./packages/autogen-core)	2m 29s
codecov (./packages/autogen-ext)	1m 15s
codecov (./packages/autogen-agentchat)	1m 0s
pyright (./packages/autogen-core)	54s
samples-code-check	53s
pyright (./packages/autogen-magentic-one)	1m 1s
pyright (./packages/agbench)	59s
test (./packages/autogen-core)	54s
pyright (./packages/autogen-ext)	1m 6s
test (./packages/autogen-magentic-one)	1m 27s
pyright (./packages/autogen-agentchat)	51s
test (./packages/autogen-ext)	3m 10s
test (./packages/autogen-agentchat)	56s
check-proto-changes-python	1m 1s
markdown-code-lint	2m 18s
mypy (./packages/autogen-core)	2m 8s
mypy (./packages/autogen-magentic-one)	1m 11s
mypy (./packages/agbench)	51s
mypy (./packages/autogen-ext)	1m 52s
mypy (./packages/autogen-agentchat)	1m 5s
	33m 4s

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