switch version number to read not notify

src/BLEOTA.cpp

@@ -1,7 +1,7 @@
 #include "BLEOTA.h"
 
 BLEOTAClass::BLEOTAClass(){
-    _pVersionNumber = new BLECharacteristic(VERSION_NUMBER_UUID, BLECharacteristic::PROPERTY_NOTIFY);
+    _pVersionNumber = new BLECharacteristic(VERSION_NUMBER_UUID, BLECharacteristic::PROPERTY_READ);
     _pVersionNumberDescriptor = new BLEDescriptor(VERSION_NUMBER_DESCRIPTOR_UUID);
 };