DOC: Add release note for expired dtype=/signature= ufunc deprecation

numpy · Nov 7, 2022 · ef38bff · ef38bff
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diff --git a/doc/release/upcoming_changes/22540.expired.rst b/doc/release/upcoming_changes/22540.expired.rst
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+* Passing dtype instances other than the default ones to
+  ``dtype=`` or ``signature=` in ufuncs will now raise a
+  ``TypeError``.  (Initially deprecated in NumPy 1.21.)