Add org.gnome.NautilusPreviewer to ignore list PapirusDevelopmentTeam#2007

Author: SmartFinn

tools/missing_flathub_apps.sh

@@ -41,6 +41,7 @@ IGNORED_APPS=(
 	org.freedesktop.Platform.VulkanInfo
 	org.genivi.DLTViewer
 	org.godotengine.godot.BaseApp
+	org.gnome.NautilusPreviewer
 	org.mosh.mosh
 	org.mozilla.firefox.BaseApp
 	org.nuspell.Nuspell