Fix govroam Icon ID

Author: jwijenbergh

cmd/geteduroam-gui/resources/share_getgovroam/applications/nl.govroam.getgovroam.desktop

@@ -4,6 +4,6 @@ Encoding=UTF-8
 Name=getgovroam
 Comment=A govroam client for Linux. Getgovroam simplifies the process of connecting to govroam.
 Exec=getgovroam-gui
-Icon=app.getgovroam.getgovroam
+Icon=nl.govroam.getgovroam
 Terminal=false
 Categories=Network;Utility;