[4.0] It was a diffenent factory (#21587)

* I was a diffenent factory

* lowercase keyword

Author: rdeutz

libraries/src/Document/Document.php

@@ -12,7 +12,7 @@
 
 use Joomla\Application\AbstractWebApplication;
 use Joomla\CMS\Date\Date;
-use Joomla\CMS\Factory;
+use Joomla\CMS\Factory as CmsFactory;
 use Joomla\CMS\Log\Log;
 use Symfony\Component\WebLink\HttpHeaderSerializer;
 
@@ -332,7 +332,7 @@ public static function getInstance($type = 'html', $attributes = array())
 
 		if (empty(self::$instances[$signature]))
 		{
-			self::$instances[$signature] = Factory::getContainer()->get(FactoryInterface::class)->createDocument($type, $attributes);
+			self::$instances[$signature] = CmsFactory::getContainer()->get(FactoryInterface::class)->createDocument($type, $attributes);
 		}
 
 		return self::$instances[$signature];
@@ -1283,7 +1283,7 @@ public function parse($params = array())
 	 */
 	public function render($cache = false, $params = array())
 	{
-		$app = Factory::getApplication();
+		$app = CmsFactory::getApplication();
 
 		if ($mdate = $this->getModifiedDate())
 		{
@@ -1369,7 +1369,7 @@ protected function preloadAssets()
 		// Check if the manager's provider has links, if so add the Link header
 		if ($links = $this->getPreloadManager()->getLinkProvider()->getLinks())
 		{
-			Factory::getApplication()->setHeader('Link', (new HttpHeaderSerializer)->serialize($links));
+			CmsFactory::getApplication()->setHeader('Link', (new HttpHeaderSerializer)->serialize($links));
 		}
 	}
 }