Add github-actions to Dependabot

.github/dependabot.yml

@@ -1,3 +1,6 @@
+# Dependabot automatically keeps our packages up to date
+# Docs: https://docs.github.com/en/free-pro-team@latest/github/administering-a-repository/configuration-options-for-dependency-updates
+
 version: 2
 updates:
 - package-ecosystem: gomod
@@ -6,3 +9,13 @@ updates:
     interval: daily
     time: "11:00"
   open-pull-requests-limit: 99
+  reviewers:
+  - parkr
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "11:00"
+  open-pull-requests-limit: 99
+  reviewers:
+  - parkr