App Manager v1.117.4 release notes (#2724)

* App Manager v1.117.4 release notes

---------

Co-authored-by: replicated-ci-kots <[email protected]>
Co-authored-by: Salah Al Saleh <[email protected]>

Author: 3 people

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

@@ -18,6 +18,15 @@ The following table lists the versions of Kubernetes that are compatible with ea
 
 <!--RELEASE_NOTES_PLACEHOLDER-->
 
+## 1.117.4
+
+Released on October 8, 2024
+
+Support for Kubernetes: 1.29, 1.30, and 1.31
+
+### Improvements {#improvements-1-117-4}
+* Various improvements for surfacing errors in Embedded Cluster upgrades.
+
 ## 1.117.3
 
 Released on September 23, 2024