Switch CI/CD to use compiler version

Author: Camshaft54

.github/workflows/workflow.yml

@@ -12,19 +12,18 @@ jobs:
         os:
           - macos-latest
           - ubuntu-latest
-        ocaml-version:
-          - 5.4.1
+        ocaml-compiler: 5
 
     runs-on: ${{ matrix.os }}
 
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
 
-      - name: Use OCaml ${{ matrix.ocaml-version }}
+      - name: Setup OCaml
         uses: avsm/setup-ocaml@v3
         with:
-          ocaml-version: ${{ matrix.ocaml-version }}
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
 
       - name: Set git user
         run: |