Fixed script prerequest parameter

Found this issue while using the script prerequest with parameter, throwing error as the mapping was mispelled

Author: andrez89

src/Services/FileMakerConnection.php

@@ -462,7 +462,7 @@ protected function buildPostDataFromQuery(FMBaseBuilder $query)
             'script' => 'script',
             'scriptParam' => 'script.param',
             'scriptPrerequest' => 'script.prerequest',
-            'scriptPrerequestParam' => 'script.prerequets.param',
+            'scriptPrerequestParam' => 'script.prerequest.param',
             'scriptPresort' => 'script.presort',
             'scriptPresortParam' => 'script.presort.param',
             'offset' => 'offset',