DEVELOPERS: add missing entries for configs/sipeed_licheepi_nano_defconfig

This should have been part of commit
9a51a07a9175cd564fffa89a6b8b851c258384a0 ("configs/sipeed_licheepi_nano:
new board")

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1089,7 +1089,9 @@ N:	Francisco Gonzalez <gzmorell@gmail.com>
 F:	package/ser2net/
 
 N:	Francois Dugast <francois.dugast.foss@gmail.com>
+F:	board/sipeed/licheepi_nano/
 F:	board/visionfive2/
+F:	configs/sipeed_licheepi_nano_defconfig
 F:	configs/visionfive2_defconfig
 
 N:	Francois Perrad <francois.perrad@gadz.org>