update bug section in latest.inc

Author: cjayb

doc/changes/latest.inc

@@ -88,6 +88,8 @@ Bugs
 
 - Fix bug with :ref:`mne make_scalp_surfaces` where ``--overwrite`` was not functional (:gh:`8800` by `Yu-Han Luo`_)
 
+- Fix bug in :func:`mne.viz._3d._plot_mpl_stc` where 3d projections were not working because ``Axes3D`` was not imported (:gh:`8811` by `Chris Bailey`_)
+
 API changes
 ~~~~~~~~~~~