App Manager v1.125.0 release notes (#3391)

* App Manager v1.125.0 release notes

* Update rn-app-manager.md

* Update rn-app-manager.md

* Update rn-app-manager.md

* Update rn-app-manager.md

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Co-authored-by: replicated-ci-kots <[email protected]>
Co-authored-by: Ethan Mosbaugh <[email protected]>

Author: 3 people

docs/release-notes/rn-app-manager.md

@@ -18,6 +18,16 @@ The following table lists the versions of Kubernetes that are compatible with ea
 
 <!--RELEASE_NOTES_PLACEHOLDER-->
 
+## 1.125.0
+
+Released on July 23, 2025
+
+Support for Kubernetes: 1.31, 1.32, and 1.33
+
+### Improvements {#improvements-1-125-0}
+* Fixes CVE CVE-2025-53547.
+* Improvements for Embedded Cluster.
+
 ## 1.124.18
 
 Released on June 11, 2025