update release notes (#2016)

Author: bot-sdk-js

docs-js_versioned_docs/version-v3/release-notes.mdx

@@ -20,6 +20,14 @@ import LicenseBadge from '@site/src/sap/sdk-js/LicenseBadge';
 <!-- vale off -->
 <!-- This line is used for our release notes automation -->
 
+## 3.26.1 [Core Modules] - February 17, 2025
+
+### Fixed Issues
+
+- [connectivity] Reintroduce option to pass `iss` property to `getClientCredentialsToken` function.
+  - @sap-cloud-sdk/[email protected]
+  - @sap-cloud-sdk/[email protected] (06230c3)
+
 ## 3.26.0 [Core Modules] - January 30, 2025
 
 ### New Functionalities