Bump rollup from 4.21.3 to 4.22.4 in /docs #454

Job	Run time
build (windows-latest, net472, 20.x, Release)	5m 55s
build (windows-latest, net6.0, 20.x, Release)	7m 24s
build (windows-latest, net8.0, 18.x, Release)	8m 46s
build (windows-latest, net8.0, 20.x, Release)	6m 54s
build (macos-latest, net6.0, 20.x, Release)	3m 47s
build (macos-latest, net8.0, 18.x, Release)	4m 24s
build (macos-latest, net8.0, 20.x, Release)	4m 10s
build (ubuntu-latest, net6.0, 20.x, Release)	3m 32s
build (ubuntu-latest, net8.0, 18.x, Release)	5m 8s
build (ubuntu-latest, net8.0, 20.x, Release)	4m 54s
	54m 54s

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