Fix typo in CHANGELOG.md

Author: ogoffart

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 * Collect defaults recursively (#19)
 
-## 0.2.1O - 2024-07-12
+## 0.2.10 - 2024-07-12
 
 * Revert parsing of multi-lines string while parsing features
   (Keep parsing of multi-lines string when detecting if we need to use Cargo.toml.orig)