Fix crash formatting error message (#4809)

Fix crash formatting error message

Author: abravalheri

Diff for: newsfragments/4809.bugfix.rst

@@ -0,0 +1,2 @@
+Fixed crash generating error message printed when building wheels for the
+free-threaded build using the limited API. -- by :user:`ngoldbaum`

Diff for: setuptools/command/bdist_wheel.py

@@ -294,7 +294,7 @@ def _validate_py_limited_api(self) -> None:
             raise ValueError(
                 f"`py_limited_api={self.py_limited_api!r}` not supported. "
                 "`Py_LIMITED_API` is currently incompatible with "
-                f"`Py_GIL_DISABLED` ({sys.abiflags=!r}). "
+                "`Py_GIL_DISABLED`."
                 "See https://github.com/python/cpython/issues/111506."
             )