doc: Note Python version changes in CHANGELOG (#1391)

These patch level bumps were done in #1370 and are part of the 0.25.0
release.

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 502545a..bc86812 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,10 @@
 
 ### Changed
 
+* Python version patch level bumps:
+  * 3.9.16 -> 3.9.17
+  * 3.10.9 -> 3.10.12
+  * 3.11.1 -> 3.11.4
 * (bzlmod) `pip.parse` can no longer automatically use the default
   Python version; this was an unreliable and unsafe behavior. The
   `python_version` arg must always be explicitly specified.