chore: windows tests (#1167)

shell scripts cannot be executed like binaries

Signed-off-by: Rudi Grinberg <[email protected]>

Author: rgrinberg

ocaml-lsp-server/test/e2e-new/dune

@@ -35,7 +35,7 @@
  (preprocess
   (per_module
    ((action
-     (run %{dep:for_pp.sh} %{input-file}))
+     (run sh %{dep:for_pp.sh} %{input-file}))
     for_pp)
    ((pps ppx_expect)
     action_extract