fix CI

Author: c-cube

.github/workflows/gh-pages.yml

@@ -11,14 +11,7 @@ jobs:
     steps:
       - uses: actions/checkout@main
 
-      - name: Cache opam
-        id: cache-opam
-        uses: actions/cache@v2
-        with:
-          path: ~/.opam
-          key: opam-ubuntu-latest-4.12.0
-
-      - uses: ocaml/setup-ocaml@v2
+      - uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: '4.14.x'
           allow-prerelease-opam: true

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2
-    - uses: ocaml/setup-ocaml@v2
+    - uses: ocaml/setup-ocaml@v3
       with:
         ocaml-compiler: ${{ matrix.ocaml-compiler }}
         allow-prerelease-opam: true