chore: update dependabot (#571)

- use conventional commits
- include GH actions

.github/dependabot.yml

@@ -1,12 +1,17 @@
 version: 2
 updates:
-- package-ecosystem: cargo
-  directory: "/"
-  schedule:
-    interval: daily
-  open-pull-requests-limit: 20
-  rebase-strategy: disabled
-- package-ecosystem: "github-actions"
-  directory: "/"
-  schedule:
-    interval: "daily"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: ci
+      include: scope
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: chore
+      prefix-development: test
+      include: scope