Add issue #647 to CHANGELOG (qubes deps. missing) #2018

Job	Run time
build-deb	9m 37s
macOS	2m 55s
windows	5m 13s
install-deb (ubuntu-20.04, ubuntu, 20.04)	5m 7s
install-deb (ubuntu-22.04, ubuntu, 22.04)	3m 33s
install-deb (ubuntu-23.04, ubuntu, 23.04)	2m 38s
install-deb (ubuntu-23.10, ubuntu, 23.10)	2m 41s
install-deb (debian-bullseye, debian, bullseye)	2m 34s
install-deb (debian-bookworm, debian, bookworm)	2m 18s
install-deb (debian-trixie, debian, trixie)	2m 16s
	38m 52s

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