ref: deprecate old sentry handler (#2051)

Author: Litarnus

src/Monolog/Handler.php

@@ -16,6 +16,9 @@
  * This Monolog handler logs every message to a Sentry's server using the given
  * hub instance.
  *
+ * @deprecated since version 4.24. To be removed in version 5.0. Use {@see LogsHandler}
+ *             with the `enable_logs` SDK option instead.
+ *
  * @author Stefano Arlandini <sarlandini@alice.it>
  */
 final class Handler extends AbstractProcessingHandler