Fixed #34013 -- Added QuerySet.order_by() support for annotation transforms.

Thanks Eugene Morozov and Ben Nace for the reports.

docs/releases/5.1.txt

@@ -181,6 +181,9 @@ Models
   :class:`~django.db.models.expressions.ValueRange` allows excluding rows,
   groups, and ties from the window frames.
 
+* :meth:`.QuerySet.order_by` now supports ordering by annotation transforms
+  such as ``JSONObject`` keys and ``ArrayAgg`` indices.
+
 Requests and Responses
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