Fix deprecation warnings in element-wise array comparison
There are deprecation warnings like
/builds/ethan.payne/pydarm/pydarm/actuation.py:594: DeprecationWarning: elementwise comparison failed; this will raise an error in the future.
if np.atleast_1d(np.atleast_1d(frequencies) == np.atleast_1d(saved_freq_array)).all():
which this MR fixes