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/lychee/Chart.yaml

@@ -16,7 +16,7 @@ deprecated: false
 description: Lychee is a free photo-management tool, which runs on your server or
   web-space
 home: https://github.com/truecharts/apps/tree/master/charts/stable/lychee
-icon: https://truecharts.org/_static/img/appicons/lychee-icon.png
+icon: https://truecharts.org/_static/img/appicons/lychee.png
 keywords:
 - lychee
 - photo