minor changleog updates

Author: luss

CHANGELOG

@@ -3,13 +3,13 @@
    - add paging support for ldap (pull 89)
    - fix ldap right parens escaping (pull 89)
 
-3.1: (2025-09)
+3.1: (2025-08-27)
    - add support for Python 3.13
    - add support for pg18
    - drop support for Postgres versions prior to 14
    - rework usage Doc from Sphinx into simple Markdown
 
-3.0: (2024-09)
+3.0: (2024-09-03)
    - drop support for Python 3 versions prior to 3.9
    - drop support for Postgres versions prior to 12
    - PG14: fix DELETE to not passing rowid_column to the FDW (https://github.com/pgsql-io/multicorn2/pull/41)