docs: configure Pi-Hole v6 API with URL that ends with admin

Author: eoleedi

docs/customservices.md

@@ -468,7 +468,8 @@ The following configuration is available for the PiHole service.
 - name: "Pi-hole"
   logo: "assets/tools/sample.png"
   # subtitle: "Network-wide Ad Blocking" # optional, if no subtitle is defined, PiHole statistics will be shown
-  url: "http://192.168.0.151/admin" # For v6 API, do not include /admin in the URL
+  url: "http://192.168.0.151/admin"
+  # endpoint: "http://192.168.0.151" # optional, For v6 API, this is the base URL used to fetch Pi-hole data overwriting the url
   apikey: "<---insert-api-key-here--->" # optional, needed if web interface is password protected
   type: "PiHole"
   apiVersion: 5 # optional, defaults to 5. Use 6 if your PiHole instance uses API v6