Add some missing history annotations.

Thanks to @mflatt for pointing this out.

pkgs/racket-doc/scribblings/reference/match.scrbl

@@ -511,7 +511,10 @@ Like @racket[match-let], but generalizes @racket[letrec].}
 
 @defform[(match-letrec-values ([(pat ...) expr] ...) body ...+)]{
 
-Like @racket[match-let], but generalizes @racket[letrec-values].}
+Like @racket[match-let], but generalizes @racket[letrec-values].
+
+@history[#:added "6.1.1.8"]
+}
  
 @defform[(match-define pat expr)]{
 

pkgs/racket-doc/syntax/scribblings/define.scrbl

@@ -47,4 +47,6 @@ expr]] are allowed, and they are preserved in the expansion.}
   If @racket[err-no-body?] is true, then there must be a right-hand side
   expression or else it is a syntax error. The @racket[err-no-body?] argument
   is true for uses of @racket[normalize-definition].
+
+  @history[#:added "6.1.1.8"]
 }