chore(deps): update deps/paho.mqtt.cpp digest to 4691652 #5172

Job	Run time
build-linux (ubuntu-20.04, Debug, 386)	2m 19s
build-windows (windows-2019, Debug, 386)	4m 25s
build-linux (ubuntu-20.04, Debug, amd64)	1m 28s
build-windows (windows-2019, Debug, amd64)	4m 18s
docker	2m 54s
build-linux (ubuntu-20.04, Release, 386)	1m 30s
build-windows (windows-2019, Release, 386)	4m 28s
build-linux (ubuntu-20.04, Release, amd64)	1m 26s
build-windows (windows-2019, Release, amd64)	4m 22s
build-linux (ubuntu-22.04, Debug, 386)	1m 21s
build-windows (windows-2022, Debug, 386)	4m 0s
build-linux (ubuntu-22.04, Debug, amd64)	1m 10s
build-windows (windows-2022, Debug, amd64)	4m 11s
build-linux (ubuntu-22.04, Release, 386)	9s
build-windows (windows-2022, Release, 386)	4m 16s
build-linux (ubuntu-22.04, Release, amd64)	1s
build-windows (windows-2022, Release, amd64)	4m 20s
release	0s
	46m 38s

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