Update changelog for 12.1.6 #242

Job	Run time
lint-unit / yamllint	9s
lint-unit / rspec	37s
lint-unit / check-metadata	0s
lint-unit / cookstyle	33s
lint-unit / markdownlint-cli2	5s
lint-unit / markdown-link-check	12s
integration-windows (windows-2016, resources)	42s
integration-windows (windows-2019, resources)	40s
integration-macos (macos-latest, resources)	2m 10s
integration (almalinux-8, resources)	1m 16s
integration (almalinux-8, source)	3m 25s
integration (amazonlinux-2, resources)	1m 19s
integration (amazonlinux-2, source)	3m 4s
integration (centos-7, resources)	32s
integration (centos-7, source)	35s
integration (centos-stream-8, resources)	34s
integration (centos-stream-8, source)	34s
integration (debian-10, resources)	34s
integration (debian-10, source)	4m 25s
integration (debian-11, resources)	1m 16s
integration (debian-11, source)	3m 2s
integration (opensuse-leap-15, resources)	1m 23s
integration (opensuse-leap-15, source)	1m 50s
integration (rockylinux-8, resources)	1m 27s
integration (rockylinux-8, source)	3m 28s
integration (ubuntu-1804, resources)	32s
integration (ubuntu-1804, source)	36s
integration (ubuntu-2004, resources)	1m 16s
integration (ubuntu-2004, source)	3m 34s
Final Results	1s
	39m 51s

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