Merge pull request #3180 from Calinou/fix-dark-theme-xml-highlight

Fix highlighting of XML tags when using a dark theme

_static/css/custom.css

@@ -349,7 +349,8 @@ code,
     color: var(--highlight-type2-color);
 }
 
-.highlight .nf {
+.highlight .nf,
+.highlight .nt {
     color: var(--highlight-function-color);
 }