In typesystem.rakudoc, replace ambiguous word "it" by explicit ".bless" (#4636)

Currently the text reads as if "it" was referring to "`.new`", which would be the reverse meaning.

Author: schultzdavid

doc/Language/typesystem.rakudoc

@@ -243,7 +243,7 @@ L<.bless|/type/Mu#method_bless>. It
 is meant to set private and public attributes of a class and receives all named
 attributes passed into C<.bless>. The default
 constructor L<.new|/type/Mu#method_new> defined in L<C<Mu>|/type/Mu> is the method that
-invokes it. Given that public accessor methods are not available in C<BUILD>,
+invokes C<.bless>. Given that public accessor methods are not available in C<BUILD>,
 you must use private attribute notation instead.
 
     class C {