docs: fix allowed data types for the matmul operator (including backport)

Author: kgryte

spec/2023.12/API_specification/array_object.rst

@@ -87,7 +87,7 @@ A conforming implementation of the array API standard must provide and support a
     -   `operator.matmul(x1, x2) <https://docs.python.org/3/library/operator.html#operator.matmul>`_
     -   `operator.__matmul__(x1, x2) <https://docs.python.org/3/library/operator.html#operator.__matmul__>`_
 
-The matmul ``@`` operator should be defined for arrays having real-valued data types.
+The matmul ``@`` operator should be defined for arrays having numeric data types.
 
 Bitwise Operators
 ~~~~~~~~~~~~~~~~~

spec/draft/API_specification/array_object.rst

@@ -87,7 +87,7 @@ A conforming implementation of the array API standard must provide and support a
     -   `operator.matmul(x1, x2) <https://docs.python.org/3/library/operator.html#operator.matmul>`_
     -   `operator.__matmul__(x1, x2) <https://docs.python.org/3/library/operator.html#operator.__matmul__>`_
 
-The matmul ``@`` operator should be defined for arrays having real-valued data types.
+The matmul ``@`` operator should be defined for arrays having numeric data types.
 
 Bitwise Operators
 ~~~~~~~~~~~~~~~~~