add dependabot for github actions. (#952)

diff --git a/dependabot.yaml b/dependabot.yaml
new file mode 100644 (file)
index 0000000..5ace460
--- /dev/null
+++ b/dependabot.yaml
@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"