minor #18747 [Validator] add section for overridden properties (Valmonzo)

This PR was merged into the 5.4 branch.

Discussion
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[Validator] add section for overridden properties

Fixes #14784.

This is my first contribution, hope I did right.
Thanks `@HeahDude` for your help 🙏🏽

Commits
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97ccd6c [Validator] add section for overridden properties

Author: javiereguiluz

validation.rst

@@ -730,6 +730,27 @@ constraint that's applied to the class itself. When that class is validated,
 methods specified by that constraint are simply executed so that each can
 provide more custom validation.
 
+Validating Object With Inheritance
+----------------------------------
+
+When you validate an object that extends another class, the validator
+automatically validates constraints defined in the parent class as well.
+
+.. caution::
+
+    Note that overriding a property with others constraints in a child class
+    will not remove the constraints defined in the parent class on that same
+    property.
+    Instead, the constraints will be merged for that property.
+    This is related to Java Language Specification.
+
+.. tip::
+
+    If you want to override constraints defined in the parent class, you should
+    define them in a different validation group instead and validate the object
+    with that group.
+    See :doc:`Validation Groups </validation/groups>` for more information.
+
 Debugging the Constraints
 -------------------------