docs(changelog): Add 1.2.1 description

Author: julienloizelet

CHANGELOG.md

@@ -11,6 +11,17 @@ The [public API](https://semver.org/spec/v2.0.0.html#spec-item-1) of this librar
 Splunk app: i.e., all files and folders except ones that are ignored by the `.slimignore` file.
 
 
+---
+
+## [1.2.1](https://github.com/crowdsecurity/crowdsec-splunk-app/releases/tag/v1.2.1) - 2025-06-27
+
+[_Compare with previous release_](https://github.com/crowdsecurity/crowdsec-splunk-app/compare/v1.2.0...v1.2.1)
+
+
+### Fixed
+
+- Make API key editable in the UI
+
 ---
 
 ## [1.2.0](https://github.com/crowdsecurity/crowdsec-splunk-app/releases/tag/v1.2.0) - 2025-05-16