[10.x] update doc block in PendingProcess.php (#50198)

* refactor(PendingProcess): update doc block for start method

* refactor(PendingProcess): update doc block for resolveAsynchronousFake method

Author: saMahmoudzadeh

src/Illuminate/Process/PendingProcess.php

@@ -266,8 +266,10 @@ public function run(array|string $command = null, callable $output = null)
      * Start the process in the background.
      *
      * @param  array<array-key, string>|string|null  $command
-     * @param  callable  $output
+     * @param  callable|null  $output
      * @return \Illuminate\Process\InvokedProcess
+     *
+     * @throws \RuntimeException
      */
     public function start(array|string $command = null, callable $output = null)
     {
@@ -382,6 +384,8 @@ protected function resolveSynchronousFake(string $command, Closure $fake)
      * @param  callable|null  $output
      * @param  \Closure  $fake
      * @return \Illuminate\Process\FakeInvokedProcess
+     *
+     * @throw \LogicException
      */
     protected function resolveAsynchronousFake(string $command, ?callable $output, Closure $fake)
     {