Update facade docblocks

Author: taylorotwell

src/Illuminate/Support/Facades/Process.php

@@ -35,7 +35,7 @@
  * @method static \Illuminate\Process\Factory assertDidntRun(\Closure|string $callback)
  * @method static \Illuminate\Process\Factory assertNothingRan()
  * @method static \Illuminate\Process\Pool pool(callable $callback)
- * @method static \Illuminate\Process\Pipe pipe(callable $callback)
+ * @method static \Illuminate\Process\Pipe pipe(callable $callback, callable|null $output = null)
  * @method static \Illuminate\Process\ProcessPoolResults concurrently(callable $callback, callable|null $output = null)
  * @method static \Illuminate\Process\PendingProcess newPendingProcess()
  * @method static void macro(string $name, object|callable $macro)