remove hardcoded username from css and desktop entry

config/applications/switch-wallpaper.desktop

@@ -1,5 +1,5 @@
 [Desktop Entry]
 Name=Switch Wallpaper
-Exec=/home/ulve/.local/bin/wallpaper.sh
+Exec=bash -c '~/.local/bin/wallpaper.sh'
 Type=Application
 Categories=Utility;

config/waybar/style.css

@@ -12,7 +12,7 @@ window#waybar {
 }
 
 #custom-nurgle {
-  background-image: url("/home/ulve/.config/waybar/nurgle.png");
+  background-image: url("~/.config/waybar/nurgle.png");
   background-size: 20px 20px;
   background-repeat: no-repeat;
   background-position: center;