MAINT: fix warning about pp_* skip selector for PyPy wheels not being needed

This is a follow-up to pydatagh-481, which moved to cibuildwheel 3.x which
removed PyPy from the default set of wheels being built.

Author: rgommers

.github/workflows/ci.yml

@@ -61,7 +61,7 @@ jobs:
       - name: Build wheels
         uses: pypa/[email protected]
         env:
-          CIBW_SKIP: "pp* *_i686"
+          CIBW_SKIP: "*_i686"
           CIBW_ENABLE: cpython-freethreading
 
       - name: Store wheel artifacts