.? is called safe call operator

As per https://en.wikipedia.org/wiki/Safe_navigation_operator

Author: zoffixznet

doc/Language/operators.pod6

@@ -538,7 +538,7 @@ Technically this is not an operator, but syntax special-cased in the compiler.
 X«|postfix .?»
 =head2 postfix C«.?»
 
-X<Potential method call>s. C<$invocant.?method> calls method C<method> on
+X<Safe call operator>. C<$invocant.?method> calls method C<method> on
 C<$invocant> if it has a method of such name. Otherwise it returns L<Nil>.
 
 Technically this is not an operator, but syntax special-cased in the compiler.