Update mne/utils/docs.py

fix: correct typo in docs.py

Co-authored-by: Thomas S. Binns <t.s.binns@outlook.com>

Author: Dpereaptkhamur-13

mne/utils/docs.py

@@ -4104,7 +4104,7 @@ def _reflow_param_docstring(docstring, has_first_line=True, width=75):
 - Average reference:
     A new virtual reference electrode is created by averaging the current
     EEG signal by setting ``ref_channels='average'``. Bad EEG channels are
-    automatically excluded if they are pproperly set in ``info['bads']``.
+    automatically excluded if they are properly set in ``info['bads']``.
 
     "add_reference_channels_note": """.. note:: When performing average referencing in sensor-space analyses and the
         original reference electrode is not present as a zero-filled channel,