LibJS: Replace a few dbg() with dbgln()

Author: https://github.com/linusg
Commit: 5de5af60c1
Pull-request: https://github.com/SerenityOS/serenity/pull/3681

Libraries/LibJS/MarkupGenerator.cpp

@@ -331,7 +331,7 @@ MarkupGenerator::StyleType MarkupGenerator::style_type_for_token(Token token)
     case TokenType::Identifier:
         return StyleType::Identifier;
     default:
-        dbg() << "Unknown style type for token " << token.name();
+        dbgln("Unknown style type for token {}", token.name());
         ASSERT_NOT_REACHED();
     }
 }