chore: add font url

SWHL · web-flow · commit 8d8db9728191 · 2026-03-06T14:03:50.000+08:00
diff --git a/mkdocs.yml b/mkdocs.yml
@@ -131,6 +131,7 @@ markdown_extensions:
 
 extra_css:
   - stylesheets/extra.css
+  - https://cdn.jsdelivr.net/npm/lxgw-wenkai-screen-web/style.css
 
 extra:
   social:
