fix: wrong icon file name

Author: ahme-dev

package.json

@@ -14,7 +14,7 @@
 	"categories": [
 		"Themes"
 	],
-	"icon": "assets/iconnobg.png",
+	"icon": "assets/icon-nobg.png",
 	"keywords": [
 		"dark",
 		"dim",