SyntaxWarning in Python >=3.12

[evilkermit]

FYI, when running on Python3.12 and newer, we are seeing the following:

/lib/python3.13/site-packages/trame_datagrid/widgets/datagrid.py:35: SyntaxWarning: invalid escape sequence '\|'
  :param auto_size_column: Autosize config Enable columns autoSize, for more details check @autoSizeColumn plugin By default disabled, hence operation is not resource efficient true to enable with default params (double header separator click for autosize) or provide config boolean \| { mode?: ColumnAutoSizeMode; allColumns?: boolean; letterBlockSize?: number; preciseSize?: boolean; } false

[jourdain]

Someone will need to update https://github.com/Kitware/trame-datagrid/blob/master/.api.yaml