Merge pull request #266 from n-osborne/update-github-action

Update github action

Author: n-osborne

.github/workflows/build.yml

@@ -8,10 +8,10 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install OCaml compiler
-        uses: ocaml/setup-ocaml@v2
+        uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: 5.0
           dune-cache: true