docs: Move ubluetooth under "MicroPython-specific libraries".
CPython does not have a bluetooth module,
so it is not appropriate to call ubluetooth
a Python standard library or micro-library.
@@ -80,7 +80,6 @@ it will fallback to loading the built-in ``ujson`` module.
sys.rst
uarray.rst
ubinascii.rst
- ubluetooth.rst
ucollections.rst
uerrno.rst
uhashlib.rst
@@ -113,6 +112,7 @@ the following libraries.
machine.rst
micropython.rst
network.rst
+ ubluetooth.rst
ucryptolib.rst
uctypes.rst
