App Manager v1.117.3 release notes (#2673)

* App Manager v1.117.3 release notes

* Update rn-app-manager.md

---------

Co-authored-by: replicated-ci-kots <[email protected]>
Co-authored-by: Alex Parker <[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-->
 
+## 1.117.3
+
+Released on September 23, 2024
+
+Support for Kubernetes: 1.29, 1.30, and 1.31
+
+### New Features {#new-features-1-117-3}
+* If the Replicated SDK is deployed by KOTS as part of an application, the SDK will automatically be configured with any additional CA certificates provided to `--private-ca-configmap` flag for the `kots install` command.
+
 ## 1.117.2
 
 Released on September 20, 2024