[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

djangocms_snippet/admin.py

@@ -1,12 +1,12 @@
 from django.conf import settings
-from django.conf.urls import url
 from django.contrib import admin
 from django.contrib.admin import helpers
 from django.contrib.admin.exceptions import DisallowedModelAdminToField
 from django.contrib.admin.options import IS_POPUP_VAR, TO_FIELD_VAR
 from django.contrib.admin.utils import flatten_fieldsets, unquote
 from django.db import models
 from django.forms import Textarea
+from django.urls import path
 from django.utils.translation import gettext as _
 
 from cms.utils.permissions import get_model_permission_codename
@@ -142,8 +142,8 @@ def preview_view(self, request, snippet_id=None, form_url='', extra_context=None
     def get_urls(self):
         info = self.model._meta.app_label, self.model._meta.model_name
         return [
-           url(
-                   r"^(?P<snippet_id>\d+)/preview/$",
+           path(
+                   '<int:snippet_id>/preview/',
                    self.admin_site.admin_view(self.preview_view),
                    name="{}_{}_preview".format(*info),
                ),