DOCSP-44610: fix php links (#217)

Author: rustagir

source/languages/php.txt

@@ -32,7 +32,7 @@ using the extension and the library together to build an application.
 
    .. card::
       :headline: Extension
-      :url: https://www.php.net/manual/en/set.mongodb.php
+      :url: https://www.php.net/manual/en/book.mongodb.php
       :icon: /images/icons/php.svg
       :icon-alt: Driver card icon