github CI: Add lwt as a CI dependency, it's still needed for

ocaml-evtchn tests

Signed-off-by: Andrii Sultanov <[email protected]>

.github/workflows/setup-env/action.yml

@@ -40,6 +40,7 @@ runs:
     - name: Install dependencies
       shell: bash
       run: opam install . --deps-only --with-test -v
+      run: opam install lwt
 
     - name: list
       shell: bash