Add dependabot workflow for github-actions

Change-Id: I5b128a33f9fd91be432111846a6fe8b929e4f94c
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..538923c
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every week
+      interval: "daily"