[autofix.ci] apply automated fixes

Author: autofix-ci[bot]

doc/jupyterlite_xeus_setup_cell.py

@@ -41,6 +41,10 @@
     sphinx_gallery_conf["first_notebook_cell"] = XEUS_FIRST_NOTEBOOK_CELL
 """
 
+# Authors: The MNE-Python contributors.
+# License: BSD-3-Clause
+# Copyright the MNE-Python contributors.
+
 # The setup cell source, as a string (mirrors how conf.py stores the Pyodide one).
 XEUS_FIRST_NOTEBOOK_CELL = r"""# 💡 Auto-added setup cell (xeus-python kernel).
 # MNE and its dependencies are pre-installed in this kernel; this cell only