Update changelog for 5.0.20 #236

Job	Run time
lint-unit / cookstyle	36s
lint-unit / markdown-link-check	27s
lint-unit / check-metadata	0s
lint-unit / markdownlint-cli2	3s
lint-unit / rspec	35s
lint-unit / yamllint	7s
integration (amazonlinux-2023, checksum-examples)	1m 20s
integration (amazonlinux-2023, multi-instance)	1m 8s
integration (amazonlinux-2023, templated-service)	1m 15s
integration (centos-7, checksum-examples)	31s
integration (centos-7, multi-instance)	31s
integration (centos-7, templated-service)	35s
integration (centos-stream-8, checksum-examples)	39s
integration (centos-stream-8, multi-instance)	33s
integration (centos-stream-8, templated-service)	31s
integration (centos-stream-9, checksum-examples)	1m 55s
integration (centos-stream-9, multi-instance)	2m 42s
integration (centos-stream-9, templated-service)	1m 49s
integration (debian-10, checksum-examples)	33s
integration (debian-10, multi-instance)	53s
integration (debian-10, templated-service)	33s
integration (debian-9, checksum-examples)	32s
integration (debian-9, multi-instance)	32s
integration (debian-9, templated-service)	33s
integration (ubuntu-1804, checksum-examples)	32s
integration (ubuntu-1804, multi-instance)	36s
integration (ubuntu-1804, templated-service)	31s
integration (ubuntu-2004, checksum-examples)	1m 40s
integration (ubuntu-2004, multi-instance)	1m 39s
integration (ubuntu-2004, templated-service)	1m 31s
integration (ubuntu-2204, checksum-examples)	1m 32s
integration (ubuntu-2204, multi-instance)	1m 40s
integration (ubuntu-2204, templated-service)	1m 34s
	30m 8s

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