Relax version requirements for py-setuptools.

--- pyproject.toml.orig	2025-06-23 15:36:27 UTC
+++ pyproject.toml
@@ -1,3 +1,3 @@
 [build-system]
-requires = ["setuptools >= 68.0.0", "wheel", "setuptools-scm >= 3.0.3"]
+requires = ["setuptools", "wheel", "setuptools-scm >= 3.0.3"]
 build-backend = "setuptools.build_meta"
