Fixed intersphinx link

Author: evaherrada

docs/conf.py

@@ -24,7 +24,7 @@
 intersphinx_mapping = {
     "python": ("https://docs.python.org/3.4", None),
     "BusDevice": (
-        "https://circuitpython.readthedocs.io/projects/bus_device/en/latest/",
+        "https://circuitpython.readthedocs.io/projects/busdevice/en/latest/",
         None,
     ),
     "CircuitPython": ("https://circuitpython.readthedocs.io/en/latest/", None),