fix typos

Author: mrs1669

include/swift/ABI/Task.h

@@ -186,7 +186,7 @@ class NullaryContinuationJob : public Job {
   }
 };
 
-/// Descibes type information and offers value methods for an arbitrary concrete
+/// Describes type information and offers value methods for an arbitrary concrete
 /// type in a way that's compatible with regular Swift and embedded Swift. In
 /// regular Swift, just holds a Metadata pointer and dispatches to the value
 /// witness table. In embedded Swift, because we do not have any value witness
@@ -424,7 +424,7 @@ class AsyncTask : public Job {
 
   /// WARNING: Only to be used during task completion (destroy).
   ///
-  /// This is because between task creation and its destory, we cannot carry the
+  /// This is because between task creation and its destroy, we cannot carry the
   /// exact record to `pop(record)`, and instead assume that there will be
   /// exactly one record remaining -- the "initial" record (added during
   /// creating the task), and it must be that record that is removed by this