Bump actions/download-artifact from 4 to 6 #330

Job	Run time
Build, test, publish / build, test, package	3m 28s
Build, test, publish / Run simple test	57s
Build, test, publish / Run AzDO test	0s
Build, test, publish / Run GitHub feature-docker-from-docker test	2m 25s
Build, test, publish / Run GitHub docker-from-docker-non-root test	2m 6s
Build, test, publish / Run test with config file	55s
Build, test, publish / Run GitHub docker-compose with features test	2m 37s
Build, test, publish / Run GitHub run-args test	1m 17s
Build, test, publish / Run GitHub docker-from-docker-root test	2m 2s
Build, test, publish / Run GitHub skipContainerUserIdUpdate test	1m 18s
Build, test, publish / Run GitHub env-vars-on-post-create test	1m 7s
Build, test, publish / Run test without runCmd	45s
Build, test, publish / Run GitHub platform and runCmd test	1m 25s
Build, test, publish / Run GitHub build-args test	1m 17s
Build, test, publish / Run GitHub dockerfile-context test	1m 17s
Build, test, publish / test-github-output	1m 8s
Build, test, publish / Test multiple tags job 1	-1s
Build, test, publish / Test multiple tags job 2	0s
Build, test, publish / All succeeded	0s
Build, test, publish / Create release	0s
Build, test, publish / Mark PR checks as complete	0s
	24m 3s

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