Fix typo

src/lang/Nub.Lang/Frontend/Parsing/Parser.cs

@@ -535,7 +535,7 @@ public class Parser
                         if (type is not NubStructType structType)
                         {
                             throw new ParseException(Diagnostic
-                                .Error($"Cannot use new keyword on type {type}")
+                                .Error($"Cannot alloc type '{type}'")
                                 .At(symbolToken)
                                 .Build());
                         }