DEVELOPERS: add Peter Korsgaard for wireguard

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit e440f7d86c4128828466ff3adc7eb2bea80afd0e)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -1804,6 +1804,7 @@ F:	package/python-websocket-client/
 F:	package/sedutil/
 F:	package/tpm2-totp/
 F:	package/triggerhappy/
+F:	package/wireguard/
 
 N:	Peter Seiderer <ps.report@gmx.net>
 F:	board/raspberrypi/