Update facade docblocks

Author: taylorotwell

src/Illuminate/Support/Facades/Mail.php

@@ -48,6 +48,9 @@
  * @method static void assertQueued(string|\Closure $mailable, callable|int|null $callback = null)
  * @method static void assertNotQueued(string|\Closure $mailable, callable|null $callback = null)
  * @method static void assertNothingQueued()
+ * @method static void assertSentCount(int $count)
+ * @method static void assertQueuedCount(int $count)
+ * @method static void assertOutgoingCount(int $count)
  * @method static \Illuminate\Support\Collection sent(string|\Closure $mailable, callable|null $callback = null)
  * @method static bool hasSent(string $mailable)
  * @method static \Illuminate\Support\Collection queued(string|\Closure $mailable, callable|null $callback = null)