ci: check if switch available

Author: maiste

.github/workflows/oxcaml.yml

@@ -22,16 +22,19 @@ jobs:
             art-w: "git+https://github.com/art-w/jst-opam-repository.git#init-ocaml-4.14.2"
             default: "git+https://github.com/ocaml/opam-repository.git"
       - uses: actions/checkout@v4
-
       # This is required for the test suite
       - name: Set git user
         run: |
           git config --global user.name github-actions[oxcaml-bot]
           git config --global user.email github-actions[oxcaml-bot]@users.noreply.github.com
 
-      - name: Install deps
+      - name: Check opam switch
         run: |
+          opam switch list
           ocaml --version
+
+      - name: Install deps
+        run: |
           opam install . --deps-only # Need to add --with-test
           opam exec -- make dev-deps