Enable background audio

used by some DanaKit users, which doesn't provide a heartbeat

Trio/Resources/Info.plist

@@ -103,6 +103,7 @@
 		<string>fetch</string>
 		<string>processing</string>
 		<string>remote-notification</string>
+		<string>audio</string>
 	</array>
 	<key>UIFileSharingEnabled</key>
 	<true/>