Fix article title

ntrel · ntrel · commit 5deedec9ebab · 2022-02-08T21:47:53.000Z
diff --git a/articles/mixin.dd b/articles/mixin.dd
@@ -91,5 +91,5 @@ END
 )
 
 Macros:
-        TITLE=Mixins
+        TITLE=String Mixins
         SUBNAV=$(SUBNAV_ARTICLES)
