Update mdoc to 2.5.4 (#1390) #1558

Job	Run time
bincompat	2m 57s
examples (ubuntu-latest)	2m 38s
examples (windows-latest)	5m 1s
format	23s
integration-tests (ubuntu-22.04)	29m 19s
publishLocal	16m 30s
integration-tests (macos-12)	36m 4s
integration-tests (windows-latest)	23m 13s
test (ubuntu-latest, 8, 2.12.18)	2m 40s
website	1m 8s
test (ubuntu-latest, 8, 2.12.19)	2m 22s
test (ubuntu-latest, 8, 2.13.13)	2m 34s
test (ubuntu-latest, 8, 2.13.14)	2m 18s
test (ubuntu-latest, 8, 3.3.3)	2m 30s
test (ubuntu-latest, 8, 3.4.2)	2m 29s
test (windows-latest, 8, 2.13.14)	2m 58s
test (macos-12, 8, 2.13.14)	2m 37s
test (ubuntu-latest, 17, 2.13.14)	2m 45s
all-tests	1s
	2h 20m 27s

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