Use latest setup-ocaml again as Windows git config issue is fixed (#6059)

This reverts commit e9b20ae.

Author: cknitt

.github/workflows/ci.yml

@@ -86,7 +86,7 @@ jobs:
           chmod +x _build/install/default/bin/*
 
       - name: Use OCaml ${{matrix.ocaml_compiler}}
-        uses: ocaml/setup-ocaml@v2.0.10
+        uses: ocaml/setup-ocaml@v2
         with:
           ocaml-compiler: ${{matrix.ocaml_compiler}}
           opam-pin: false