Update uptime-kuma.md

Took me a while to figure this out, so here's a small clarification that can same a lot of time.

docs/widgets/services/uptime-kuma.md

@@ -5,7 +5,7 @@ description: Uptime Kuma Widget Configuration
 
 Learn more about [Uptime Kuma](https://github.com/louislam/uptime-kuma).
 
-As Uptime Kuma does not yet have a full API the widget uses data from a single "status page". As such you will need a status page setup with a group of monitored sites, which is where you get the slug (without the `/status/` portion).
+As Uptime Kuma does not yet have a full API the widget uses data from a single "status page". As such you will need a status page setup with a group of monitored sites, which is where you get the slug (without the `/status/` portion). E.g. if your status page is https://url-address/status/MyStatusPage, insert `slug: mystatuspage`, in lower-case as slug is case-sensitive.
 
 Allowed fields: `["up", "down", "uptime", "incident"]`.
 
@@ -13,5 +13,5 @@ Allowed fields: `["up", "down", "uptime", "incident"]`.
 widget:
   type: uptimekuma
   url: http://uptimekuma.host.or.ip:port
-  slug: statuspageslug
+  slug: status-page-slug
 ```