fix typo

Author: coke

doc/Type/IO/CatHandle.pod6

@@ -267,7 +267,7 @@ valid idiom for obtaining the currently-active handle. If, between
 L<reification|/language/glossary#index-entry-Reify> of the elements of the
 returned L<Seq> the handles get switched by some other means, the next
 element produced by the L<Seq> would be the next handle of the invocant, not
-the handle that would've been produced if no switching occured:
+the handle that would've been produced if no switching occurred:
 
     (my $file1 := 'file1'.IO).spurt: "1a\n1b\n1c";
     (my $file2 := 'file2'.IO).spurt: "2a\n2b\n2c";