Fix plant-it docs

docs/widgets/services/plantit.md

@@ -1,15 +1,17 @@
----
-title: Plant-it
-description: Plant-it Widget Configuration
----
-
-Learn more about [Plantit](https://github.com/MDeLuise/plant-it).
-
-API key can be created from the REST API.
-
-```yaml
-widget:
-  type: plantit
-  url: http://plant-it.host.or.ip:port # api port
-  key: plantit-api-key
-```
+---
+title: Plant-it
+description: Plant-it Widget Configuration
+---
+
+Learn more about [Plantit](https://github.com/MDeLuise/plant-it).
+
+API key can be created from the REST API.
+
+Allowed fields: `["events", "plants", "photos", "species"]`.
+
+```yaml
+widget:
+  type: plantit
+  url: http://plant-it.host.or.ip:port # api port
+  key: plantit-api-key
+```