Update news entry

Author: notatallshaw

news/13229.bugfix.rst

@@ -1 +1,4 @@
-Expand deprecation warning for wheels with non-standard file names.
+Parse wheel filenames according to `binary distribution format specification
+<https://packaging.python.org/en/latest/specifications/binary-distribution-format/#file-format>`_.
+When a filename doesn't match the spec a deprecation warning is emitted and the
+filename is parsed using the old method.