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/pwndrop/Chart.yaml

@@ -7,7 +7,7 @@ description: Pwndrop is a self-deployable file hosting service for sending out r
 type: application
 deprecated: false
 home: https://github.com/truecharts/apps/tree/master/charts/stable/pwndrop
-icon: https://truecharts.org/_static/img/appicons/pwndrop-icon.png
+icon: https://truecharts.org/_static/img/appicons/pwndrop.png
 keywords:
   - pwndrop
 sources: