Update spec theme to be consistent with rest of oneAPI documentation.

Author: zackwaters

scripts/templates/conf.py.mako

@@ -21,7 +21,7 @@
 # -- Project information -----------------------------------------------------
 
 project = u'Level Zero Specification'
-copyright = u'2020, Intel'
+copyright = u'2022, Intel'
 author = u'Intel'
 
 # The short X.Y version
@@ -85,7 +85,7 @@ pygments_style = None
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'sphinx_rtd_theme'
+html_theme = 'sphinx_book_theme'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the

third_party/requirements.txt

@@ -25,7 +25,7 @@ six==1.13.0
 snowballstemmer==2.0.0
 soupsieve==1.9.5
 Sphinx==4.5.0
-sphinx-rtd-theme==1.0.0
+sphinx-book-theme==0.2.0
 sphinxcontrib-applehelp==1.0.2
 sphinxcontrib-devhelp==1.0.2
 sphinxcontrib-htmlhelp==2.0.0