Fix typoes, Coke++

Author: lizmat

doc/Type/Scheduler.pod6

@@ -27,7 +27,7 @@ code that is being scheduled and run.
 
 =head2 method cue
 
-    method cue(&code, Instant :$at, :$in, :$every, :$times = 1; :&catch -> $cancelation)
+    method cue(&code, Instant :$at, :$in, :$every, :$times = 1; :&catch --> $cancellation)
 
 Schedules a callable (C<&code>) for execution and returns an instantiated
 C<Cancellation> object to cancel the scheduling of the code for execution