Bump version to 4.8.1 #321

Job	Run time
Wait-for-package-building	1m 7s
Wait-for-package-building	6s
Test-install-rpm-systems	0s
Test-install-rpm-systems (oraclelinux:9, x86_64, agent)	25s
Test-install-rpm-systems (oraclelinux:9, x86_64, manager)	2m 34s
Test-install-rpm-systems (almalinux:9, x86_64, agent)	17s
Test-install-rpm-systems (almalinux:9, x86_64, manager)	1m 0s
Test-install-rpm-systems (rockylinux:9, x86_64, agent)	20s
Test-install-rpm-systems (rockylinux:9, x86_64, manager)	57s
Test-install-rpm-systems (centos:7, x86_64, agent)	17s
Test-install-rpm-systems (centos:7, x86_64, manager)	58s
Test-install-rpm-systems (centos:8, x86_64, agent)	17s
Test-install-rpm-systems (centos:8, x86_64, manager)	59s
Test-install-rpm-systems (i386/centos:7, i386, agent)	16s
Test-install-rpm-systems (redhat/ubi8:latest, x86_64, agent)	18s
Test-install-rpm-systems (redhat/ubi8:latest, x86_64, manager)	57s
Test-install-rpm-systems (redhat/ubi9:latest, x86_64, agent)	18s
Test-install-rpm-systems (redhat/ubi9:latest, x86_64, manager)	56s
Test-install-rpm-systems (amazonlinux:2, x86_64, agent)	15s
Test-install-rpm-systems (amazonlinux:2, x86_64, manager)	58s
Test-install-rpm-systems (fedora:34, x86_64, agent)	40s
Test-install-rpm-systems (fedora:34, x86_64, manager)	1m 24s
Test-install-rpm-systems (centos:6.9, x86_64, initd, agent)	17s
	15m 36s

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