Fix CI by using setup-ocaml
v3 for ocamlformat workflow
#3426
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ubuntu-latest
is currently rolling to Ubuntu 24.04 (actions/runner-images#10636). This breakssetup-ocaml@v2
because of a missing dependency (ocaml/setup-ocaml#872), which, in turn, breaks ourocamlformat
workflow (#3425).Upgrading to
setup-ocaml@v3
fixes this.Review: @mshinwell or @xclerc