Fix mypy

pydoctor/epydoc/markup/restructuredtext.py

@@ -47,7 +47,7 @@
 
 from docutils.core import publish_string
 from docutils.writers import Writer
-from docutils.parsers.rst.directives.admonitions import BaseAdmonition # type: ignore[import]
+from docutils.parsers.rst.directives.admonitions import BaseAdmonition # type: ignore[import-untyped]
 from docutils.readers.standalone import Reader as StandaloneReader
 from docutils.utils import Reporter
 from docutils.parsers.rst import Directive, directives