fix url warning of trailing slash in finances

scipost_django/finances/urls.py

@@ -66,7 +66,7 @@ urlpatterns = [
                                             name="_hx_subsidypayment_form",
                                         ),
                                         path(
-                                            "<int:subsidypayment_id>",
+                                            "<int:subsidypayment_id>/",
                                             include(
                                                 [
                                                     path(
@@ -75,7 +75,7 @@ urlpatterns = [
                                                         name="_hx_subsidypayment_form",
                                                     ),
                                                     path(
-                                                        "/delete",
+                                                        "delete",
                                                         views._hx_subsidypayment_delete,
                                                         name="_hx_subsidypayment_delete",
                                                     ),