Update Doc/library/gzip.rst

set versionchanged to next

Co-authored-by: Pieter Eendebak <pieter.eendebak@gmail.com>

Author: morotti

Doc/library/gzip.rst

@@ -59,7 +59,7 @@ The module defines the following items:
    .. versionchanged:: 3.6
       Accepts a :term:`path-like object`.
 
-   .. versionchanged:: 3.14
+   .. versionchanged:: next
       The default compression level was reduced to 6 (down from 9).
       It is the default level used by most compression tools and a better
       tradeoff between speed and performance.