docs: release v2.1.1 changelog #3

Job	Run time
build-and-push (subgeneratorr-worker, web/Dockerfile, .)	9m 47s
build-and-push (subgeneratorr-cli, cli/Dockerfile, .)	5m 44s
build-and-push (subgeneratorr-web, web/Dockerfile, .)	8m 58s
	24m 29s

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