Changed use of 0FILE to CWD

doc/Type/IO/Notification.pod6

@@ -20,12 +20,12 @@ C<IO::Notification.watch-path($path)> produces a L<Supply|/type/Supply> of
 C<IO::Notification::Change> events for a file or directory.
 
 Here is a small example that prints the first ten FileChanged-notifications for
-the current directory:
+the current working directory:
 
 =for code :skip-test
 my $finish = Promise.new;
 my $count = 0;
-IO::Notification.watch-path($?FILE).act( -> $change {
+IO::Notification.watch-path($*CWD).act( -> $change {
     $count++ if $change.event ~~ FileChanged;
     say "($count) $change.path(): $change.event()";
     $finish.keep if $count >= 10;