ci: added git-cliff changelog automation #235

Job	Run time
windows-latest (release) - conda	5m 50s
ubuntu-latest (release) - venv	2m 53s
ubuntu-latest (oldrel-1) - venv	11m 57s
macOS-latest (release) - conda	4m 46s
windows-latest (release) - venv	4m 38s
ubuntu-latest (release) - conda	3m 16s
ubuntu-latest (oldrel-2) - venv	2m 29s
macOS-latest (release) - venv	2m 45s
ubuntu-latest (oldrel-3) - venv	2m 17s
	40m 51s

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