chore(deps): update deps/paho.mqtt.cpp digest to a513e06 #5174

Job	Run time
docker	2m 31s
build-linux (ubuntu-20.04, Debug, 386)	2m 30s
build-windows (windows-2019, Debug, 386)	3m 45s
build-linux (ubuntu-20.04, Debug, amd64)	2m 17s
build-windows (windows-2019, Debug, amd64)	3m 56s
build-linux (ubuntu-20.04, Release, 386)	2m 27s
build-linux (ubuntu-20.04, Release, amd64)	2m 30s
build-windows (windows-2019, Release, 386)	3m 49s
build-linux (ubuntu-22.04, Debug, 386)	2m 15s
build-windows (windows-2019, Release, amd64)	3m 53s
build-linux (ubuntu-22.04, Debug, amd64)	2m 14s
build-windows (windows-2022, Debug, 386)	3m 33s
build-linux (ubuntu-22.04, Release, 386)	2m 30s
build-windows (windows-2022, Debug, amd64)	3m 48s
build-linux (ubuntu-22.04, Release, amd64)	2m 26s
build-windows (windows-2022, Release, 386)	3m 53s
build-windows (windows-2022, Release, amd64)	3m 54s
release	0s
	52m 11s

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