fix bug in dcp update for rpc requests #2321

Job	Run time
format	55s
lint	49s
mypy (./packages/autogen-core)	1m 56s
mypy (./packages/autogen-magentic-one)	1m 17s
pyright (./packages/autogen-core)	1m 10s
mypy (./packages/agbench)	1m 2s
mypy (./packages/autogen-ext)	1m 42s
pyright (./packages/autogen-magentic-one)	56s
check-proto-changes-python	1m 4s
mypy (./packages/autogen-agentchat)	1m 17s
pyright (./packages/agbench)	57s
pyright (./packages/autogen-ext)	1m 16s
docs (./packages/autogen-core)	1m 20s
pyright (./packages/autogen-agentchat)	1m 0s
docs-example-check (./packages/autogen-core)	2m 4s
test (./packages/autogen-core)	1m 29s
test (./packages/autogen-magentic-one)	1m 24s
test (./packages/autogen-ext)	2m 5s
test (./packages/autogen-agentchat)	1m 9s
	24m 52s

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