Update CHANGELOG.md

Author: Ryu0118

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Next Version
 
+### Fixed
+- Added validation to ensure that all values in `settings.configs` are mappings. Previously, passing non-mapping values did not raise an error, making it difficult to detect misconfigurations. Now, `SpecParsingError.invalidConfigsMappingFormat` is thrown if misused. #1547 @Ryu0118
+
 ## 2.43.0
 
 ### Added