Update peps/pep-0810.rst

Co-authored-by: Barry Warsaw <barry@python.org>

Author: pablogsal

peps/pep-0810.rst

@@ -571,7 +571,7 @@ Lazy imports filter
 
 This PEP adds the following new functions to manage the lazy imports filter:
 
-* ``importlib.set_lazy_imports_filter(func)`` - Sets the filter function. The
+* ``importlib.set_lazy_imports_filter(func)`` - Sets the filter function. If `func=None` then the import filter is removed. The
   ``func`` parameter must have the signature: ``func(importer: str, name: str,
   fromlist: tuple[str, ...] | None) -> bool``