chore(dependabot): improve config

.github/dependabot.yml

@@ -1,13 +1,18 @@
-# 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://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
 
 version: 2
 updates:
-  - package-ecosystem: "cargo" # See documentation for possible values
-    directory: "/" # Location of package manifests
+  - package-ecosystem: "cargo"
+    directory: "/"
     schedule:
       interval: "weekly"
     commit-message:
       prefix: "chore(cargo):"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "chore(actions):"