fixup! OxCaml: setup CI

Author: vouillon

.github/workflows/js_of_ocaml.yml

@@ -170,7 +170,7 @@ jobs:
         if: ${{ matrix.skip-test }}
 
       - name: Pin qcheck
-        run: opam pin add https://github.com/vouillon/qcheck.git
+        run: opam pin add -n https://github.com/vouillon/qcheck.git#oxcaml
         if: matrix.ocaml-compiler == 'ocaml-variants.5.2.0+ox'
 
       - run: opam install . --deps-only --with-test

.github/workflows/wasm_of_ocaml.yml

@@ -139,7 +139,7 @@ jobs:
         if: matrix.ocaml-compiler != 'ocaml-variants.5.2.0+ox'
 
       - name: Pin qcheck
-        run: opam pin add https://github.com/vouillon/qcheck.git
+        run: opam pin add -n https://github.com/vouillon/qcheck.git#oxcaml
         if: matrix.ocaml-compiler == 'ocaml-variants.5.2.0+ox'
 
       - name: Checkout Jane Street packages