App Manager v1.115.1 release notes (#2587)

* App Manager v1.115.1 release notes

* Update rn-app-manager.md

---------

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

@@ -16,6 +16,15 @@ The following table lists the versions of Kubernetes that are compatible with ea
 
 <!--RELEASE_NOTES_PLACEHOLDER-->
 
+## 1.115.1
+
+Released on August 22, 2024
+
+Support for Kubernetes: 1.28, 1.29, and 1.30
+
+### Bug Fixes {#bug-fixes-1-115-1}
+* Fixes an issue where the default `nodeMetrics` analyzer did not run.
+
 ## 1.115.0
 
 Released on August 20, 2024