Fix GH #54853: BUG: DeprecationWarning for frontend.OptionParser when building docs (#54854)

* Fix GH #54853: BUG: DeprecationWarning for frontend.OptionParser when building docs

See docutils/docutils@6548b56#diff-a033583f6ace19fed2adc108b1c130e17ea00e1afee38c22c993cb477ad27a5fR453

* Use `docutils.frontend.get_default_settings` instead of relying on `docutils.core`.

---------

Co-authored-by: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>

Author: DavidToneian

doc/make.py

@@ -159,10 +159,10 @@ def _get_page_title(self, page):
         Open the rst file `page` and extract its title.
         """
         fname = os.path.join(SOURCE_PATH, f"{page}.rst")
-        option_parser = docutils.frontend.OptionParser(
-            components=(docutils.parsers.rst.Parser,)
+        doc = docutils.utils.new_document(
+            "<doc>",
+            docutils.frontend.get_default_settings(docutils.parsers.rst.Parser),
         )
-        doc = docutils.utils.new_document("<doc>", option_parser.get_default_values())
         with open(fname, encoding="utf-8") as f:
             data = f.read()