chore: bump minimal rocq version #3945

Job	Run time
nix	2m 10s
build (dev, --warnings)	3m 42s
build (9.1)	3m 23s
build (9.0)	3m 16s
quick-build (dev, ubuntu-latest)	3m 25s
quick-build (9.0, ubuntu-latest)	3m 11s
opam-build (9.0, ubuntu-latest)	4m 17s
opam-build (9.1, ubuntu-latest)	4m 23s
quick-build (9.1, ubuntu-latest)	3m 5s
opam-build (dev, ubuntu-latest)	4m 9s
doc-alectryon	12m 6s
coqchk (9.1)	1m 46s
doc-timing	1m 32s
coqchk (dev)	2m 2s
doc-coqdoc	1m 32s
coqchk (9.0)	1m 49s
install (9.0)	1m 30s
install (9.1)	1m 46s
install (dev)	1m 27s
doc-dep-graphs	7m 39s
delete-artifacts	10s
deploy-doc	-1s
	1h 8m 19s

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