Enhancement: Bump pwsh 7.4 variants to 7.4.6 #257

Job	Run time
build-6-2-4	2m 55s
build-6-0-4	2m 30s
build-6-1-3	3m 11s
build-7-0-3	2m 58s
build-7-1-5	2m 43s
build-7-2	2m 19s
build-7-3	2m 30s
build-7-4	2m 27s
test-nogitdiff	17s
update-dockerhub-description	0s
publish-draft-release	0s
update-draft-release	0s
	21m 50s

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