Fix check-manifest warning about trailing slash
@@ -6,8 +6,8 @@ include pyproject.toml
include src/pip/_vendor/README.rst
include src/pip/_vendor/vendor.txt
-recursive-include src/pip/_vendor/ *LICENSE*
-recursive-include src/pip/_vendor/ *COPYING*
+recursive-include src/pip/_vendor *LICENSE*
+recursive-include src/pip/_vendor *COPYING*
include docs/docutils.conf
