fix Coq 8.9+beta1 install file
fix Coq 8.9+beta1 install file

gmalecha/opam-coq-archive,gmalecha/opam-coq-archive,mattam82/coq-opam-archive,coq/opam-coq-archive,gmalecha/opam-coq-archive,mattam82/coq-opam-archive,mattam82/coq-opam-archive