Merge pull request #426 from Foundation-Devices/add_dependabot_gha

Add automatic Dependabot Github Action dependency updates.

.github/workflows/dependabot.yaml

@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText:  © 2021 Foundation Devices, Inc. <hello@foundationdevices.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# dependabot.yaml - Set update schedule for GitHub Actions
+
+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every week
+      interval: "weekly"