Fix broken link

Author: tisonkun

doc/Type/Supply.pod6

@@ -42,7 +42,7 @@ methods such as L<interval|#method interval>, L<from-list|#method from-list>
 will return I<on demand> supplies.
 
 A live C<Supply> that keeps values until tapped the first time can be created
-with L<Supplier::Preserving|/type/Supplier/Preserving>.
+with L<Supplier::Preserving|/type/Supplier::Preserving>.
 
 Further examples can be found in the L<concurrency page|/language/concurrency#Supplies>.