Update equalize_channels docstring

Author: tsbinns

mne/channels/channels.py

@@ -120,8 +120,11 @@ def equalize_channels(instances, copy=True, verbose=None):
     ----------
     instances : list
         A list of MNE-Python objects to equalize the channels for. Objects can
-        be of type Raw, Epochs, Evoked, AverageTFR, Forward, Covariance,
+        be of type Raw, Epochs, Evoked, Spectrum, AverageTFR, Forward, Covariance,
         CrossSpectralDensity or Info.
+
+        .. versionchanged:: 1.11
+            Added support for :class:`mne.time_frequency.Spectrum` objects.
     copy : bool
         When dropping and/or re-ordering channels, an object will be copied
         when this parameter is set to ``True``. When set to ``False`` (the