Add missing Lidarr widget

Service-Widgets.md

@@ -125,6 +125,20 @@ widget:
 ```
 
 
+## Lidarr
+
+Find your API key under `Settings > General`.
+
+Allowed fields: `["wanted", "queued", "albums"]`.
+
+```yaml
+widget:
+  type: lidarr
+  url: http://lidarr.host.or.ip
+  key: apikeyapikeyapikeyapikeyapikey
+```
+
+
 ## Bazarr
 
 Find your API key under `Settings > Generaly`.