Fix issue while loading a container

When the URI of the container contains escaped characters like `%2F`, `simplexml_load_file` throw an error.

Author: jdeniau

src/Symfony/XmlServiceMapFactory.php

@@ -20,7 +20,7 @@ public function __construct(string $containerXml)
 
 	public function create(): ServiceMap
 	{
-		$xml = @simplexml_load_file($this->containerXml);
+		$xml = @simplexml_load_file(rawurlencode($this->containerXml));
 		if ($xml === false) {
 			throw new XmlContainerNotExistsException(sprintf('Container %s does not exist or cannot be parsed', $this->containerXml));
 		}