Zend certified PHP/Magento developer

Magento 2.4 altering admin controller post value using plugin

I tried changing the values using before dispatch plugin using below code but it’s not working.

public function beforeExecute(VendorModuleControllerAdminhtmlIndexSave $subject){
$info =  $subject->getRequest()->getParam('info', false);
$subject->getRequest()->setParam('info', 'somevalue'); return true;}

Where i am going wrong here?