rustdoc: change color of trait types

Fixes #24441

Author: liigo

src/librustdoc/html/static/main.css

@@ -392,7 +392,7 @@ a {
     text-decoration: underline;
 }
 
-.content span.trait, .content a.trait, .block a.current.trait { color: #ed9603; }
+.content span.trait, .content a.trait, .block a.current.trait { color: #8866ff; }
 .content span.mod, .content a.mod, block a.current.mod { color: #4d76ae; }
 .content span.enum, .content a.enum, .block a.current.enum { color: #5e9766; }
 .content span.struct, .content a.struct, .block a.current.struct { color: #e53700; }