Update doc/data/messages/u/unnecessary-default-type-args/details.rst

Co-authored-by: Jacob Walls <[email protected]>

doc/data/messages/u/unnecessary-default-type-args/details.rst

@@ -2,5 +2,5 @@ At the moment, this check only works for ``Generator`` and ``AsyncGenerator``.
 
 Starting with Python 3.13, the ``SendType`` and ``ReturnType`` default to ``None``.
 As such it's no longer necessary to specify them. The ``collections.abc`` variants
-don't validated the number of type arguments. Therefore the defaults for these
+don't validate the number of type arguments. Therefore the defaults for these
 can be used in earlier versions as well.