chore: add dependabot

Signed-off-by: Anupam Kumar <kyteinsky@gmail.com>

Author: kyteinsky

.github/dependabot.yml

@@ -0,0 +1,12 @@
+# SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: weekly
+    day: saturday
+    time: "03:00"
+    timezone: Europe/Paris
+  open-pull-requests-limit: 10