docs fixes

Author: pelikhan

Diff for: docs/lessons/charting.md

@@ -34,3 +34,7 @@ radio.sendNumber(0)
 * learn how to register code to run when a packet is received over radio
 * learn how to broadcast a number data packet to other @boardname@s connected via radio
 * learn how to read the next radio packet as a number data packet
+
+```package
+radio
+```

Diff for: docs/reference/bluetooth.md

@@ -40,10 +40,6 @@ bluetooth.advertiseUrl("https://pxt.microbit.org/", 7, true);
 bluetooth.stopAdvertising();
 ```
 
-```package
-bluetooth
-```
-
 ### Advanced
 
 For more advanced information on the @boardname@ Bluetooth UART service including information on using a smartphone, see the [Lancaster University @boardname@ runtime technical documentation](http://lancaster-university.github.io/microbit-docs/ble/uart-service/)
@@ -60,3 +56,7 @@ For more advanced information on the @boardname@ Bluetooth UART service includin
 [onBluetoothDisconnected](/reference/bluetooth/on-bluetooth-disconnected),
 [advertiseUrl](/reference/bluetooth/advertise-url),
 [stopAdvertising](/reference/bluetooth/stop-advertising)
+
+```package
+bluetooth
+```