fix typo (#13171)

Co-authored-by: Daniel McCloy <dan@mccloy.info>
Co-authored-by: Richard Höchenberger <richard.hoechenberger@gmail.com>

Author: 3 people

mne/report/report.py

@@ -1613,7 +1613,7 @@ def add_trans(
         title : str
             The title to add.
         subject : str | None
-            The name of the FreeSurfer subject the ``trans```` belong to. The
+            The name of the FreeSurfer subject the ``trans`` belongs to. The
             name is not stored with the ``trans`` and therefore needs to be
             specified. If ``None``, will use the value of ``subject`` passed on
             report creation.