Fix migration helper api

.upptimerc.yml

@@ -207,13 +207,7 @@ sites:
 
   ### === migration-helper
   - name: migration-helper-api
-    url: https://migration-helper.darwinia.network/api/migrate
-    mehtod: POST
-    headers:
-      - "Content-Type: application/json"
-    body: '{"chainId": 1, "who": 1}'
-    expectedStatusCodes:
-      - 400
+    url: https://migration-helper.darwinia.network/api/health
 
   ### === thegraph
   - name: thegraph-dip7index-darwinia

README.md

@@ -1,4 +1,4 @@
-# [📈 Live Status](https://status.darwinia.network/): <!--live status--> **🟧 Partial outage**
+# [📈 Live Status](https://status.darwinia.network): <!--live status--> **🟧 Partial outage**
 
 This repository contains the open-source uptime monitor and status page for [Upptime](https://upptime.js.org), powered by [Upptime](https://github.com/upptime/upptime).
 
@@ -49,7 +49,7 @@ With [Upptime](https://upptime.js.org), you can get your own unlimited and free
 
 <!--end: status pages-->
 
-[**Visit our status website →**](https://demo.upptime.js.org)
+[**Visit our status website →**](https://status.darwinia.network)
 
 ## 📄 License