Update JwksDecorator

Author: cicnavi

src/Jwks/JwksDecorator.php

@@ -29,9 +29,11 @@ public function jsonSerialize(): array
     {
         // @phpstan-ignore return.type (So I don't have to override JWK::jsonSerialize which actually returns OK)
         return [
-            ClaimsEnum::Keys->value => array_map(
-                fn(JWK $jwk): array => $jwk->jsonSerialize(),
-                $this->jwks->all(),
+            ClaimsEnum::Keys->value => array_values(
+                array_map(
+                    fn(JWK $jwk): array => $jwk->jsonSerialize(),
+                    $this->jwks->all(),
+                ),
             ),
         ];
     }