appdata: Fix developer id

It should be in rDNS format

Author: AsciiWolf

Diff for: data/org.gnome.NetworkDisplays.appdata.xml.in

@@ -10,7 +10,7 @@
 	<url type="bugtracker">https://gitlab.gnome.org/GNOME/gnome-network-displays/-/issues</url>
 	<url type="vcs-browser">https://gitlab.gnome.org/GNOME/gnome-network-displays</url>
 	<url type="translate">https://l10n.gnome.org/module/gnome-network-displays/</url>
-	<developer id="gnome.org">
+	<developer id="org.gnome">
 		<name translatable="no">Benjamin Berg, Christian Glombek</name>
 	</developer>
 	<translation type="gettext">gnome-network-displays</translation>