fix changelog not work

CHANGELOG.md

@@ -66,7 +66,7 @@
   - [Downloads for v1.6.0](#downloads-for-v160)
     - [Client Binaries](#client-binaries-9)
     - [Server Binaries](#server-binaries-9)
-  - [WARNING: etcd backup strongly recommended](#warning:-etcd-backup-strongly-recommended)
+  - [WARNING: etcd backup strongly recommended](#warning-etcd-backup-strongly-recommended)
   - [Major updates and release themes](#major-updates-and-release-themes)
   - [Action Required](#action-required-3)
     - [Certificates API](#certificates-api)
@@ -393,8 +393,8 @@
   - [Known Issues](#known-issues-1)
   - [Notable Changes to Existing Behavior](#notable-changes-to-existing-behavior-1)
     - [Deployments](#deployments)
-    - [kubectl rolling-update: < v1.4.0 client vs >=v1.4.0 cluster](#kubectl-rolling-update:-<-v140-client-vs->=v140-cluster)
-    - [kubectl delete: < v1.4.0 client vs >=v1.4.0 cluster](#kubectl-delete:-<-v140-client-vs->=v140-cluster)
+    - [kubectl rolling-update: < v1.4.0 client vs >=v1.4.0 cluster](#kubectl-rolling-update--v140-client-vs-v140-cluster)
+    - [kubectl delete: < v1.4.0 client vs >=v1.4.0 cluster](#kubectl-delete--v140-client-vs-v140-cluster)
     - [DELETE operation in REST API](#delete-operation-in-rest-api)
   - [Action Required Before Upgrading](#action-required-before-upgrading-1)
 - [optionally, remove the old secret](#optionally-remove-the-old-secret)