Activate dune-cache in setup-ocaml (CI)

Author: mbarbin

.github/workflows/ci.yml

@@ -28,6 +28,7 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          dune-cache: true
           opam-repositories: |
             default: https://github.com/ocaml/opam-repository.git
             mbarbin: https://github.com/mbarbin/opam-repository.git

.github/workflows/deploy-odoc.yml

@@ -24,6 +24,7 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: "5.3.x"
+          dune-cache: true
           opam-repositories: |
             default: https://github.com/ocaml/opam-repository.git
             mbarbin: https://github.com/mbarbin/opam-repository.git

.github/workflows/more-ci.yml

@@ -45,6 +45,7 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          dune-cache: true
           opam-repositories: |
             default: https://github.com/ocaml/opam-repository.git
             mbarbin: https://github.com/mbarbin/opam-repository.git