fix: remove explicit chinese fonts

these are already handled by `sans-serif`

PingFang SC is used on macOS
Noto Sans CJK is used on Ubuntu
Microsoft YaHei is used on Windows

follow up on #4286

src/client/theme-default/styles/vars.css

@@ -270,8 +270,8 @@
 
 :root:where(:lang(zh)) {
   --vp-font-family-base: 'Punctuation SC', 'Inter', ui-sans-serif, system-ui,
-    'PingFang SC', 'Noto Sans CJK SC', 'Noto Sans SC', sans-serif,
-    'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
+    sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol',
+    'Noto Color Emoji';
 }
 
 /**