Add missing headings to changelog

Author: imjoehaines

CHANGELOG.md

@@ -3,16 +3,22 @@ Changelog
 
 ## 1.14.2 (2024-06-06)
 
+### Bug Fixes
+
 * Prevent duplicate `Configuration` class declaration warnings
   [#178](https://github.com/bugsnag/bugsnag-symfony/pull/178)
 
 ## 1.14.1 (2024-01-23)
 
+### Bug Fixes
+
 * Fix "Configuration class not found" error when using Composer's `--classmap-authoritative` option
   [#174](https://github.com/bugsnag/bugsnag-symfony/pull/174)
 
 ## 1.14.0 (2024-01-16)
 
+### Enhancements
+
 * Add support for Symfony 7
   [elliotbruneel](https://github.com/elliotbruneel)
   [jdecool](https://github.com/jdecool)