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/headphones/Chart.yaml

@@ -7,7 +7,7 @@ dependencies:
 description: "An automated music downloader for NZB and Torrent, written in Python.\
   \ It supports SABnzbd, NZBget, Transmission, \xB5Torrent and Blackhole."
 home: https://github.com/truecharts/apps/tree/master/charts/stable/headphones
-icon: https://truecharts.org/_static/img/appicons/headphones-icon.png
+icon: https://truecharts.org/_static/img/appicons/headphones.png
 keywords:
 - headphones
 - music