fix(series): improve future warning

This change makes the warning more explicit about data types,
where it clearly states that are talking about boolean numpy backend
or object dtype.

Also clearly states that it returns a numpy boolean series.

Author: Alvaro-Kothe

pandas/core/series.py

@@ -6161,9 +6161,11 @@ def _align_for_op(self, right, align_asobject: bool = False):
                         np.bool_,
                     ):
                         warnings.warn(
-                            "Operation between non boolean Series with different "
-                            "indexes will no longer return a boolean result in "
-                            "a future version. Cast both Series to object type "
+                            "Operation between Series with different indexes "
+                            "that are not of numpy boolean or object dtype "
+                            "will no longer return a numpy boolean result "
+                            "in a future version. "
+                            "Cast both Series to object type "
                             "to maintain the prior behavior.",
                             FutureWarning,
                             stacklevel=find_stack_level(),