Update .asf.yaml (#3)

diff --git a/.asf.yaml b/.asf.yaml
index 24d7567..54c47fb 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -29,4 +29,14 @@
     enabled_merge_buttons:
       squash:  true
       merge:   false
-      rebase:  false  
+      rebase:  false
+    protected_branches:
+      master:
+        required_status_checks:
+          strict: true
+          contexts:
+            - e2e
+      required_pull_request_reviews:
+        dismiss_stale_reviews: true
+        required_approving_review_count: 1
+        
diff --git a/README.md b/README.md
index 4b2c700..c163b9d 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 
 [![Twitter Follow](https://img.shields.io/twitter/follow/asfskywalking.svg?style=for-the-badge&label=Follow&logo=twitter)](https://twitter.com/AsfSkyWalking)
 
-![CI](https://github.com/apache/skywalking-kong/workflows/CI/badge.svg?branch=master)
+![E2E](https://github.com/apache/skywalking-kong/workflows/e2e/badge.svg?branch=master)
 
 SkyWalking Kong agent built on [SkyWalking Nginx Lua agent](https://github.com/apache/skywalking-nginx-lua) to trace Kong API gateway for [Apache SkyWalking](https://github.com/apache/skywalking) APM.