Not Pair.freeze is proposed for removal in 6.d

Proposal: Raku/6.d-prep@ce7fab350a

Author: zoffixznet

doc/Type/Pair.pod6

@@ -289,6 +289,8 @@ Makes the I<value> of the C<Pair> read-only, by removing it from its L<Scalar co
     CATCH { default { put .^name, ': ', .Str } };
     # OUTPUT: «X::Assignment::RO: Cannot modify an immutable Str (apple)␤»
 
+B<NOTE:> this method is proposed for removal in B<6.d> language and its use is not recommended.
+
 =head2 method Str
 
 Defined as: