docs: update changelog (also includes item from #710)

Author: mattculler

docs/reference/changelog.rst

@@ -4,6 +4,13 @@ Changelog
 See the `Releases page`_ on GitHub for a complete list of commits that are
 included in each version.
 
+2.2.0 (2025-Jan-16)
+-------------------
+- ``hookutil.py`` now available for dependent projects to clean up lxd
+  instances.
+- Dependent projects can now disable lxd ``mknod`` interception via
+  ``LXDProvider``'s ``__init__``.
+
 2.1.0 (2025-Jan-10)
 -------------------
 - Require Multipass>=1.14.1