Merge pull request #1819 from nextcloud/chore/dependabot-stable3

Use dependabot for stable3

.github/dependabot.yml

@@ -51,3 +51,56 @@ updates:
   labels:
   - 3. to review
   - dependencies
+
+# Update stable3 until NC27 is out of support
+- package-ecosystem: composer
+  target-branch: "stable3"
+  directory: "/"
+  schedule:
+    interval: weekly
+    day: saturday
+    time: "03:00"
+    timezone: Europe/Paris
+  open-pull-requests-limit: 10
+  labels:
+  - 3. to review
+  - dependencies
+
+- package-ecosystem: composer
+  target-branch: "stable3"
+  directory: "/vendor-bin/cs-fixer/"
+  schedule:
+    interval: weekly
+    day: saturday
+    time: "03:00"
+    timezone: Europe/Paris
+  open-pull-requests-limit: 10
+  labels:
+  - 3. to review
+  - dependencies
+
+- package-ecosystem: npm
+  target-branch: "stable3"
+  directory: "/"
+  schedule:
+    interval: weekly
+    day: saturday
+    time: "03:00"
+    timezone: Europe/Paris
+  open-pull-requests-limit: 10
+  labels:
+  - 3. to review
+  - dependencies
+
+- package-ecosystem: github-actions
+  target-branch: "stable3"
+  directory: "/"
+  schedule:
+    interval: weekly
+    day: saturday
+    time: "03:00"
+    timezone: Europe/Paris
+  open-pull-requests-limit: 10
+  labels:
+  - 3. to review
+  - dependencies