ci: update dependencies also on stable3

We need to support this at least for 1.5 more years (until Nextcloud 32
is EOL). So it should have at least some kind of up-to-date
dependencies.

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

Author: susnux

.github/dependabot.yml

@@ -1,18 +1,58 @@
-# SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
 # SPDX-License-Identifier: CC0-1.0
 
 version: 2
 updates:
-- package-ecosystem: npm
-  directory: "/"
-  schedule:
-    interval: weekly
-    day: saturday
-    time: "03:00"
-    timezone: Europe/Paris
-  labels:
-    - "type: dependencies"
-  reviewers:
-    - "nextcloud-libraries/files"
-  open-pull-requests-limit: 10
-  versioning-strategy: increase
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly
+      day: saturday
+      time: "03:00"
+      timezone: Europe/Paris
+    open-pull-requests-limit: 10
+    labels:
+      - 3. to review
+      - "type: dependencies"
+
+  - package-ecosystem: npm
+    target-branch: main
+    directory: "/"
+    schedule:
+      interval: weekly
+      day: saturday
+      time: "03:00"
+      timezone: Europe/Paris
+    open-pull-requests-limit: 10
+    versioning-strategy: "increase"
+    labels:
+      - "type: dependencies"
+      - 3. to review
+    groups:
+      vitest:
+        patterns:
+          - "vitest"
+          - "@vitest/*"
+
+  - package-ecosystem: npm
+    target-branch: stable3
+    directory: "/"
+    schedule:
+      interval: weekly
+      day: saturday
+      time: "03:00"
+      timezone: Europe/Paris
+    open-pull-requests-limit: 10
+    versioning-strategy: "increase"
+    labels:
+      - 3. to review
+      - "type: dependencies"
+    ignore:
+      - dependency-name: "*"
+        # ignore all major updates
+        update-types: ["version-update:semver-major"]
+    groups:
+      vitest:
+        patterns:
+          - "vitest"
+          - "@vitest/*"