fix typos in changelog

CHANGELOG.rst

@@ -4,7 +4,7 @@
 0.6.16 (2024-12-22)
 -------------------
 
-- Fix but in ``ZonedDateTime`` ``repr()`` that would mangle some timezone names
+- Fix bug in ``ZonedDateTime`` ``repr()`` that would mangle some timezone names
 - Make ``disambiguate`` argument optional, defaulting to ``"compatible"``.
 
   **Rationale**: This required parameter was a frequent source of
@@ -25,11 +25,9 @@
 0.6.14 (2024-11-27)
 -------------------
 
-**Fixed**
-
 - Ensure docstrings and error messages are consistent in Rust extension
   as well as the pure-Python version
-- Remove ondocumented properties ``hour/minute/etc`` from ``Instant``
+- Remove undocumented properties ``hour/minute/etc`` from ``Instant``
   that were accidentally left in the Rust extension.
 - ``exact_eq()`` now also raises ``TypeError`` in the pure Python version
   when comparing different types.