fix(theme): remove some explicit Chinese fonts (#4286)

Author: Jungzl

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

@@ -270,9 +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', 'Heiti SC',
-    'Microsoft YaHei', 'DengXian', sans-serif, 'Apple Color Emoji',
-    'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
+    'PingFang SC', 'Noto Sans CJK SC', 'Noto Sans SC', sans-serif,
+    'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
 }
 
 /**