fix the anchor link

fix the anchor links about "kubectl rolling-update" and "kubectl delete", they did not work at present.

Author: tianshapjq

CHANGELOG.md

@@ -203,8 +203,8 @@
   - [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)