Add Warning section to maximum/minimum docs

Author: vlad-perevezentsev

dpnp/dpnp_iface_mathematical.py

@@ -3204,6 +3204,14 @@ def interp(x, xp, fp, left=None, right=None, period=None):
 
     Default: ``"K"``.
 
+Warning
+-------
+Passing the output array ``out`` positionally is deprecated.
+For example, ``dpnp.maximum(a, b, c)`` will emit a ``DeprecationWarning``.
+
+Always pass the output with the keyword form, e.g.
+``dpnp.maximum(a, b, out=c)``.
+
 Returns
 -------
 out : dpnp.ndarray
@@ -3316,6 +3324,14 @@ def maximum(*args, **kwargs):
     An array containing the element-wise minima. The data type of
     the returned array is determined by the Type Promotion Rules.
 
+Warning
+-------
+Passing the output array ``out`` positionally is deprecated.
+For example, ``dpnp.minimum(a, b, c)`` will emit a ``DeprecationWarning``.
+
+Always pass the output with the keyword form, e.g.
+``dpnp.minimum(a, b, out=c)``.
+
 Limitations
 -----------
 Parameters `where` and `subok` are supported with their default values.