Example should be renamed to include simpletest

[kattni]

Example busdevice_read_register_i2c.py could be renamed to busdevice_read_register_i2c_simpletest.py to match CircuitPython library standards.

The lines including this file name in the docs/examples.rst file must also be updated to reflect the name change, e.g.:

.. literalinclude:: ../examples/current_file_name.py
    :caption: examples/current_file_name.py
    :linenos:

would be updated to:

.. literalinclude:: ../examples/current_file_name_changed.py
    :caption: examples/current_file_name_changed.py
    :linenos:

[huyle101]

Hi @kattni
I have already made PR for this issue. Could you please review it and let me know if there is any problem? Thank you.

[tannewt]

Fixed by #32. Thank you @huyle1097