Add an anchor to root devices. retry...

Author: Diptorup Deb

docs/docfiles/user_guides/manual/dpctl/device_selection.rst

@@ -123,7 +123,7 @@ stored in :attr:`dpctl.SyclDevice.default_selector_score` is used to select a
 single device. Refer the documentation of :class:`dpctl.SyclDevice` for a list
 of hardware properties that may be used for device selection.
 
-.._RootDevice:
+.. _RootDevice:
 
 .. Note::
     A **root** device implies an unpartitioned device. A root device can be