Documentation: expand section on `SortModifiers` #4237

Job	Run time
formatting	21s
test (11, windows-latest)	8m 54s
native-image (macOS-latest, default)	7m 0s
test (11, ubuntu-latest)	6m 46s
native-image (ubuntu-latest, default)	3m 29s
test (21, windows-latest)	8m 34s
native-image (ubuntu-latest, musl)	3m 49s
test (21, ubuntu-latest)	6m 13s
dockerize	0s
	45m 6s

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