S03: C<true> should be C<so>

S03-operators.pod

@@ -3851,7 +3851,7 @@ that returns a constant boolean value.)
 
 Note also that regex matching does I<not> return a C<Bool>, but merely
 a C<Match> object that can be used as a boolean value.  Use an explicit
-C<?> or C<true> to force a C<Bool> value if desired.
+C<?> or C<so> to force a C<Bool> value if desired.
 
 The primary use of the C<~~> operator is to return a boolean value in
 a boolean context.  However, for certain operands such as regular