PEP 825: update the date in change history

Signed-off-by: Michał Górny <mgorny@quansight.com>

Author: mgorny

peps/pep-0825.rst

@@ -1542,7 +1542,7 @@ and Zanie Blue.
 Change History
 ==============
 
-- 08-Aug-2026
+- 10-Aug-2026
 
   - Decoupled most of the specification from `index-level metadata`_,
     clarifying that it is only an optimization for scenarios where