Bug 28189: (QA folloq-up) Fix fallback case

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

Koha/REST/V1.pm

@@ -112,7 +112,7 @@ sub startup {
 
         try {
             $validator->load_and_validate_schema(
-                $self->home->rel_file("api/v1/swagger/swagger.json"),
+                $self->home->rel_file("api/v1/swagger/swagger.yaml"),
                 {
                     allow_invalid_ref  => 1,
                     schema => ( $swagger_schema ) ? $swagger_schema : undef,