CHANGELOG.md in schemacop-3.0.27 vs CHANGELOG.md in schemacop-3.0.28

@@ -1,6 +1,10 @@
 # Change log
 
+## 3.0.28 (2023-12-20)
+
+* Fix `mailbox` format allowing incorrectly formatted strings
+
 ## 3.0.27 (2023-12-13)
 
 * Add format `mailbox` to `str` node for Schemacop3 schemas
 
 ## 3.0.26 (2023-11-16)