Patch 1.5.1 release. (#4685)

* Path 1.5.1 release.

* Added changelog.

* subheader update for changelog.

* changelog edit.

Author: bexxmodd

CHANGELOG/1.5-CHANGELOG.md

@@ -2,11 +2,27 @@
 
 ## Table of Contents
 
+- [v1.5.1](#v151)
 - [v1.5.0](#v150)
 - [v1.5.0-rc.3](#v150-rc3)
 - [v1.5.0-rc.2](#v150-rc2)
 - [v1.5.0-rc.1](#v150-rc1)
 
+# v1.5.1
+
+## Major Changes Since v1.5.0
+
+### GEP
+
+- Updates the documentation around the ListenerConditionConflicted condition (#4669, @davidjumani)
+
+### Conformance
+
+- Limit HTTPRouteHTTPSListenerDetectMisdirectedRequests to h2 only (#4665, @zirain)
+- Fix conformance test not working on IPv6 (#4646, @zirain)
+- The `conflicted=false` condition is not required anymore in the listener status for non-conflicted listeners. (#4664, @zhaohuabing)
+- Updated the TLSRoute conformance tests to allow FINs where previously RST was asserted (#4624, @howardjohn)
+
 # v1.5.0
 
 ## Major Changes Since v1.4.1