update release notes (#2315)

Author: bot-sdk-js

docs-js/release-notes.mdx

@@ -20,6 +20,17 @@ import LicenseBadge from '@site/src/sap/sdk-js/LicenseBadge';
 <!-- vale off -->
 <!-- This line is used for our release notes automation -->
 
+## 4.2.0 [Core Modules] - November 27, 2025
+
+### New Features
+
+- [generator, generator-common] Introduce option `generateESM` in OData generator to generate ESM compatible code. (c73c7fa)
+
+### Fixed Issues
+
+- [openapi] Fix missing `type: module` in generated `package.json` when `--generateESM` option is enabled. (e09754a)
+- [openapi-generator] Improve the handling of arrays of enums (f17ca59)
+
 ## 4.1.2 [Core Modules] - September 18, 2025
 
 ### Fixed Issues