fix and update alectryon #3955

Job	Run time
build (dev, --warnings)	3m 45s
build (9.0)	3m 19s
nix	2m 14s
doc-alectryon	7m 0s
opam-build (dev, ubuntu-latest)	4m 26s
quick-build (dev, ubuntu-latest)	3m 18s
quick-build (9.1, ubuntu-latest)	3m 8s
opam-build (9.0, ubuntu-latest)	4m 7s
build (9.1)	3m 16s
quick-build (9.0, ubuntu-latest)	3m 12s
opam-build (9.1, ubuntu-latest)	4m 15s
doc-dep-graphs	7m 45s
coqchk (9.0)	1m 46s
coqchk (9.1)	1m 59s
doc-coqdoc	1m 32s
doc-timing	1m 30s
coqchk (dev)	1m 58s
install (dev)	1m 41s
install (9.0)	1m 43s
install (9.1)	1m 32s
delete-artifacts	6s
deploy-doc	0s
	1h 3m 32s

Provide feedback