Fix changelog typo (#9)

Author: danieljharvey

CHANGELOG.md

@@ -4,7 +4,7 @@ This changelog documents the changes between release versions.
 ## [Unreleased]
 Changes to be included in the next upcoming release
 
-## 0.2.2 - 2025.08.18
+## [0.2.2] - 2025.08.18
 * Fix templates to refer to new package
 
 ## [0.2.1] - 2025.08.15