feat: get ar_hdf5 running again

Minor variable search-replace seems to have been missing. Fixing here.

SciFiReaders/readers/microscopy/spm/afm/AR_hdf5.py

@@ -47,8 +47,6 @@ def read(self, verbose=False):
         ----------
         verbose : Boolean (Optional)
             Whether or not to show  print statements for debugging
-        debug : Boolean (Optional)
-            Whether or not to print log statements
         Returns
         -------
         sidpy.Dataset : List of sidpy.Dataset objects.
@@ -310,7 +308,7 @@ def get_def_unit(self, chan_name):
             # This should be the laser virtual deflection
             default_unit = 'm'
         else:
-            if self.debug:
+            if self.verbose:
                 print('Unknown unit for channel: {}'.format(chan_name))
                 print('Unit set to "unknown"')
             default_unit = 'unknown'