Merge pull request #512 from ocaml-multicore/bump-setup-ocaml

Use setup-ocaml 3 for opam workflow

Author: jmid

.github/workflows/opam.yml

@@ -25,7 +25,8 @@ jobs:
           - 5.0.0
           - 5.1.0
           - 5.2.0
-          - ocaml-variants.5.3.0+trunk
+          - 5.3.0
+          - ocaml-variants.5.4.0+trunk
 
     runs-on: ubuntu-latest
 
@@ -34,10 +35,9 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install OCaml compiler
-        uses: ocaml/setup-ocaml@v2
+        uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-depext: false
 
       - name: Test installation of the OPAM packages
         run: |