Update release documentation with `v3` instructions #4379

Job	Run time
Packaging: Action input (ubuntu-latest, latest)	1m 59s
Packaging: Action input (macos-latest, latest)	3m 44s
Packaging: Action input (windows-latest, latest)	4m 48s
Packaging: Action input (ubuntu-latest, default)	2m 17s
Packaging: Action input (macos-latest, default)	4m 50s
Packaging: Action input (windows-latest, default)	5m 27s
Packaging: Action input (ubuntu-latest, nightly-latest)	1m 58s
Packaging: Action input (macos-latest, nightly-latest)	3m 11s
Packaging: Action input (windows-latest, nightly-latest)	4m 48s
	33m 2s

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