docs(pi-hole): add no-auth (#455)

Author: Meierschlumpf

docs/integrations/pi-hole/index.mdx

@@ -41,4 +41,7 @@ import { piHoleIntegration } from '.';
     credentials: ['apiKey'],
     steps: [],
     body: "Please note, that in v6 of Pi-hole you no longer specify an API key, but instead either a password or application password. We suggest to use the application password when possible."
+}, {
+    credentials: [],
+    steps: []
 }]} />