enable neighbours feature for all repeater variants

variants/xiao_s3_wio/platformio.ini

@@ -35,6 +35,7 @@ build_flags =
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
   -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=8
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1
 lib_deps =