fix: use svg to pdf converter instead of original solution
diff --git a/docs/conf.py b/docs/conf.py
index d3f7361..506e6f3 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -31,7 +31,7 @@
# Add any Sphinx extension module names here, as strings. They can be
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
# ones.
-extensions = ['breathe', 'sphinx.ext.imgconverter']
+extensions = ['breathe', 'sphinxcontrib.rsvgconverter']
breathe_projects = {'pybind11': '.build/doxygenxml/'}
breathe_default_project = 'pybind11'