increase MAX_NEIGHBOURS from 8 to 50

variants/heltec_v4/platformio.ini

@@ -55,7 +55,7 @@ build_flags =
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
   -D ADMIN_PASSWORD='"password"'
-  -D MAX_NEIGHBOURS=8
+  -D MAX_NEIGHBOURS=50
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1
 build_src_filter = ${Heltec_lora32_v4.build_src_filter}
@@ -75,7 +75,7 @@ build_flags =
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
   -D ADMIN_PASSWORD='"password"'
-  -D MAX_NEIGHBOURS=8
+  -D MAX_NEIGHBOURS=50
   -D WITH_ESPNOW_BRIDGE=1
   -D WITH_ESPNOW_BRIDGE_SECRET='"shared-secret"'
 ;  -D MESH_PACKET_LOGGING=1