fix chromium to close page instead of closing browser

Co-authored-by: Vincent Robert <[email protected]>

src/Processor/Chromium.php

@@ -136,7 +136,7 @@ public function getPdfFromString(string $html, array $params = [], bool $returnF
             Logger::debug('Could not create pdf with chromium: '. print_r($e, true));
             $output = (string) $e;
         } finally {
-            $browser->close();
+            $page->close();
         }
 
         return $output;