Bump ocaml setup and checkout action versions.

Signed-off-by: George Leontiev <[email protected]>

Author: folone

.github/workflows/workflow.yml

@@ -17,16 +17,19 @@ jobs:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
         ocaml:
-          - ocaml-base-compiler.5.1.0
+          - 5
 
     runs-on: ${{ matrix.os }}
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
+        with:
+            ref: ${{ github.event.pull_request.head.ref }}
+            repository: ${{ github.event.pull_request.head.repo.full_name }}
 
       - name: Setup OCaml ${{ matrix.ocaml }}
-        uses: ocaml/setup-ocaml@v2
+        uses: ocaml/setup-ocaml@v3
         with:
           cache-prefix: v1-${{ matrix.os }}-${{ matrix.ocaml }}
           dune-cache: true