chore: use OCaml 5.1.1-rc1 · melange-re/melange@e704675

Canceling since a higher priority waiting request for 'Opam Pipeline-refs/pull/959/merge' exists

The operation was canceled.

An error has been caught in some system package index files, so the system package index files have been re-synchronised, and the system package installation has been retried: the process '/usr/local/bin/brew' failed with exit code 1