Update changelog for 2.1.0 #156

Job	Run time
lint-unit / markdown-link-check	16s
lint-unit / markdownlint-cli2	2s
lint-unit / cookstyle	30s
lint-unit / rspec	33s
lint-unit / yamllint	7s
lint-unit / check-metadata	0s
dokken (almalinux-8, unencrypted)	1m 9s
dokken (almalinux-8, none)	1m 10s
dokken (almalinux-8, vault)	1m 13s
dokken (centos-7, unencrypted)	1m 9s
dokken (centos-7, none)	1m 5s
dokken (centos-7, vault)	1m 8s
dokken (centos-stream-8, unencrypted)	1m 9s
dokken (centos-stream-8, none)	1m 3s
dokken (centos-stream-8, vault)	1m 6s
dokken (debian-10, unencrypted)	1m 7s
dokken (debian-10, none)	1m 11s
dokken (debian-10, vault)	1m 6s
dokken (debian-11, unencrypted)	1m 9s
dokken (debian-11, none)	1m 10s
dokken (debian-11, vault)	1m 6s
dokken (rockylinux-8, unencrypted)	1m 12s
dokken (rockylinux-8, none)	1m 5s
dokken (rockylinux-8, vault)	1m 12s
dokken (ubuntu-1804, unencrypted)	1m 5s
dokken (ubuntu-1804, none)	1m 5s
dokken (ubuntu-1804, vault)	1m 10s
dokken (ubuntu-2004, unencrypted)	1m 4s
dokken (ubuntu-2004, none)	1m 5s
dokken (ubuntu-2004, vault)	1m 6s
	28m 33s

Provide feedback