update release notes (#1886)

Co-authored-by: Deeksha Sinha <[email protected]>

docs-js/release-notes.mdx

@@ -20,6 +20,20 @@ import LicenseBadge from '@site/src/sap/sdk-js/LicenseBadge';
 <!-- vale off -->
 <!-- This line is used for our release notes automation -->
 
+## 3.18.0 [Core Modules] - August 07, 2024
+
+### New Functionalities
+
+- [connectivity] Support IAS tokens without the need to pass `iss` in the destination fetch options. (06e5c72)
+- [openapi-generator, generator-common] Introduce option `generateESM` in OpenAPI generator to generate ESM compatible code. (3a93e38)
+
+### Fixed Issues
+
+- [connectivity] Fix the JwtPayload import.
+  - @sap-cloud-sdk/[email protected]
+  - @sap-cloud-sdk/[email protected] (c23ccfd)
+- [mail-client] Fix the type of `replyTo` property in the `MailConfig` interface. (00fa35d)
+
 ## 3.17.0 [Core Modules] - July 30, 2024
 
 ### New Functionalities