Use the “auto” password encoder and fix typos (#1308)

Author: samnela

core/jwt.md

@@ -66,7 +66,7 @@ Then update the security configuration:
 security:
     encoders:
         App\Entity\User:
-            algorithm: argon2i
+            algorithm: auto
 
     # https://symfony.com/doc/current/security.html#where-do-users-come-from-user-providers
     providers:
@@ -222,7 +222,7 @@ final class JwtDecorator implements OpenApiFactoryInterface
         $openApi = ($this->decorated)($context);
         $schemas = $openApi->getComponents()->getSchemas();
 
-        $schemas['Token'] = new ArrayObject([
+        $schemas['Token'] = new \ArrayObject([
             'type' => 'object',
             'properties' => [
                 'token' => [
@@ -231,7 +231,7 @@ final class JwtDecorator implements OpenApiFactoryInterface
                 ],
             ],
         ]);
-        $schemas['Credentials'] = new ArrayObject([
+        $schemas['Credentials'] = new \ArrayObject([
             'type' => 'object',
             'properties' => [
                 'email' => [