actions: smoother dependabot configuring (fixes #2258) (#2257)

Co-authored-by: dogi <dogi@users.noreply.github.com>

Author: dogi

.github/dependabot.yml

@@ -1,16 +1,20 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
-# Please see the documentation for all configuration options:
-# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
-
 version: 2
 updates:
   - package-ecosystem: "github-actions"
-    directory: "/"
+    directories:
+      - "/"
+      - "/.github/workflows"
     schedule:
       interval: "daily"
+    commit-message:
+      prefix: "actions:"
+    open-pull-requests-limit: 10
   - package-ecosystem: "gradle"
-    directory: "/"
+    directories:
+      - "/"
+      - "/app"
     schedule:
       interval: "daily"
+    commit-message:
+      prefix: "all:"
     open-pull-requests-limit: 15