Update 4.8.0 release date #306

Job	Run time
Wait-for-package-building	12m 11s
Test-install-deb-systems (ubuntu:xenial, agent, amd64)	24s
Test-install-deb-systems (ubuntu:xenial, agent, i386)	25s
Test-install-deb-systems (ubuntu:xenial, manager, amd64)	1m 28s
Test-install-deb-systems (ubuntu:bionic, agent, amd64)	19s
Test-install-deb-systems (ubuntu:bionic, agent, i386)	25s
Test-install-deb-systems (ubuntu:bionic, manager, amd64)	1m 32s
Test-install-deb-systems (ubuntu:focal, agent, amd64)	25s
Test-install-deb-systems (ubuntu:focal, agent, i386)	23s
Test-install-deb-systems (ubuntu:focal, manager, amd64)	1m 32s
Test-install-deb-systems (ubuntu:jammy, agent, amd64)	22s
Test-install-deb-systems (ubuntu:jammy, manager, amd64)	1m 19s
Test-install-deb-systems (debian:stretch, agent, amd64)	20s
Test-install-deb-systems (debian:stretch, agent, i386)	27s
Test-install-deb-systems (debian:stretch, manager, amd64)	1m 33s
Test-install-deb-systems (debian:buster, agent, amd64)	23s
Test-install-deb-systems (debian:buster, agent, i386)	25s
Test-install-deb-systems (debian:buster, manager, amd64)	1m 35s
Test-install-deb-systems (debian:bullseye, agent, amd64)	26s
Test-install-deb-systems (debian:bullseye, agent, i386)	23s
Test-install-deb-systems (debian:bullseye, manager, amd64)	1m 25s
	27m 42s

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