updated bluetooth docs page

docs/reference/bluetooth.md

@@ -1,18 +1,22 @@
 # Bluetooth
 
+Support for additional Bluetooth services.
+
 ```cards
-bluetooth.onBluetoothConnected(() => {
-    
-});
-bluetooth.onBluetoothDisconnected(() => {
-    
-});
 bluetooth.startAccelerometerService();
 bluetooth.startButtonService();
 bluetooth.startIOPinService();
 bluetooth.startLEDService();
 bluetooth.startMagnetometerService();
 bluetooth.startTemperatureService();
+bluetooth.uartRead("");
+bluetooth.uartWrite("");
+bluetooth.onBluetoothConnected(() => {
+    
+});
+bluetooth.onBluetoothDisconnected(() => {
+    
+});
 ```
 
 ```package