Update index.md

widgets.yml should be widgets.yaml now

docs/widgets/index.md

@@ -24,7 +24,7 @@ Service widgets are used to display the status of a service, often a web service
 
 ## Info Widgets
 
-Info widgets are used to display information in the header, often about your system or environment. Info widgets are defined your `widgets.yml` file. Here's an example:
+Info widgets are used to display information in the header, often about your system or environment. Info widgets are defined your `widgets.yaml` file. Here's an example:
 
 ```yaml
 - openmeteo: