increase MAX_NEIGHBOURS from 8 to 50

variants/generic_espnow/platformio.ini

@@ -42,7 +42,7 @@ build_flags =
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
   -D ADMIN_PASSWORD='"password"'
-  -D MAX_NEIGHBOURS=8
+  -D MAX_NEIGHBOURS=50
 build_src_filter = ${Generic_ESPNOW.build_src_filter}
   +<../examples/simple_repeater/*.cpp>
 lib_deps =