add changelog entry

Author: xeniape

CHANGELOG.md

@@ -20,10 +20,12 @@ All notable changes to this project will be documented in this file.
   - `csiNodeDriverRegistrar` values have been moved to `nodeDriverRegistrar`.
   - `node.driver` values have been moved to `secretOperator`.
   - `securityContext` values have been moved to `secretOperator.securityContext`.
+- Bump csi-node-driver-registrar to `v2.15.0` ([#642]).
 
 [#597]: https://github.com/stackabletech/secret-operator/pull/597
 [#636]: https://github.com/stackabletech/secret-operator/pull/636
 [#641]: https://github.com/stackabletech/secret-operator/pull/641
+[#642]: https://github.com/stackabletech/secret-operator/pull/642
 
 ## [25.7.0] - 2025-07-23