Create dependabot.yml

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# 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" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
+      timezone: "Asia/Tokyo"
+    # https://sue445.hatenablog.com/entry/2023/12/15/230043
+    groups:
+      artifact-actions:
+        patterns:
+          - "actions/upload-artifact"
+          - "actions/download-artifact"
+