Document exceptions in a generic form

Suggested during code review

Co-authored-by: Brett Cannon <brett@python.org>

docs/utils.rst

@@ -106,15 +106,11 @@ Reference
 
 .. exception:: InvalidWheelFilename
 
-    Raised by :func:`parse_wheel_filename`, when attempting to parse a wheel
-    filename that does not conform to `PEP 427`_
+    Raised when a file name for a wheel is invalid.
 
 .. exception:: InvalidSdistFilename
 
-    Raised by :func:`parse_sdist_filename`, when attempting to parse an sdist
-    filename that does not end with a ``.zip`` or ``.tar.gz`` extension, or
-    does not contain any dash character separating name and version of the
-    distribution (e.g. ``"foo1.0.tar.gz"`` instead of ``"foo-1.0.tar.gz"``).
+    Raised a source distribution file name is considered invalid.
 
 .. _Source distribution format: https://packaging.python.org/specifications/source-distribution-format/#source-distribution-file-name
 .. _`PEP 427`: https://peps.python.org/pep-0427/#file-name-convention