fix: invalid css

Author: brc-dd

src/client/theme-default/styles/components/vp-doc.css

@@ -538,11 +538,8 @@
   max-width: calc((100% - 24px) / 2) !important;
 }
 
-:is(
-  .vp-external-link-icon,
-  .vp-doc a[href*='://'],
-  .vp-doc a[target='_blank']
-)::after {
+:is(.vp-external-link-icon, .vp-doc a[href*="://"], .vp-doc a[target="_blank"])::after
+{
   display: inline-block;
   margin-top: -1px;
   margin-left: 4px;