[Uid] Add AbstractUid::toString()

Author: alamirault

components/uid.rst

@@ -179,6 +179,11 @@ Use these methods to transform the UUID object into different bases::
     $uuid->toBase58();  // string(22) "TuetYWNHhmuSQ3xPoVLv9M"
     $uuid->toRfc4122(); // string(36) "d9e7a184-5d5b-11ea-a62a-3499710062d0"
     $uuid->toHex();     // string(34) "0xd9e7a1845d5b11eaa62a3499710062d0"
+    $uuid->toString();  // string(36) "d9e7a184-5d5b-11ea-a62a-3499710062d0"
+
+.. versionadded:: 7.1
+
+    The ``toString()`` method was introduced in Symfony 7.1.
 
 You can also convert some UUID versions to others::