Reword X::Seq::Consumed message

Having seen some discussions recently, e.g:
  Raku/roast@760dbe8465d7a5

src/core/Exception.pm

@@ -2803,7 +2803,7 @@ my class X::InvalidTypeSmiley does X::Comp {
 
 my class X::Seq::Consumed is Exception {
     method message() {
-        "This Seq has already been iterated, and its values consumed\n" ~
+        "The iterator of this Seq is already in use/consumed by another Seq\n" ~
         "(you might solve this by adding .cache on usages of the Seq, or\n" ~
         "by assigning the Seq into an array)"
     }