Add a few more lines to the CHANGELOG.

Author: Julian

CHANGELOG.rst

@@ -12,6 +12,8 @@ It does so in a way that *should* be backwards compatible, preserving old behavi
 * Support for Python 3.7 has been dropped, as it is nearing end-of-life.
   This should not be a "visible" change in the sense that ``requires-python`` has been updated, so users using 3.7 should still receive ``v4.17.3`` when installing the library.
 * On draft 2019-09, ``unevaluatedItems`` now properly does *not* consider items to be evaluated by an ``additionalItems`` schema if ``items`` is missing from the schema, as the specification says in this case that ``additionalItems`` must be completely ignored.
+* Fix the ``date`` format checker on Python 3.11 (when format assertion behavior is enabled), where it was too liberal (#1076).
+* Speed up validation of ``unevaluatedProperties`` (#1075).
 
 Deprecations
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