chore(docs): Remove -icon string from icon png's (#2040)

* rename icons (remove `-icon`)

* Remove (`-icon`) from chart.yaml

* Add 2 icons

* slight format change

* remove -icon

charts/stable/authelia/Chart.yaml

@@ -15,7 +15,7 @@ dependencies:
 deprecated: false
 description: Authelia is a Single Sign-On Multi-Factor portal for web apps
 home: https://github.com/truecharts/apps/tree/master/charts/stable/authelia
-icon: https://truecharts.org/_static/img/appicons/authelia-icon.png
+icon: https://truecharts.org/_static/img/appicons/authelia.png
 keywords:
 - authelia
 - authentication