Say "support for" instead of "support of"

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: serhiy-storchaka

Doc/library/argparse.rst

@@ -1683,7 +1683,7 @@ The Namespace object
    which returns a copy of the object with the specified attributes replaced.
 
    .. versionchanged:: next
-      Added support of :func:`copy.replace`.
+      Added support for :func:`copy.replace`.
 
    This class is deliberately simple, just an :class:`object` subclass with a
    readable string representation. If you prefer to have dict-like view of the