chore: Enable Dependabot to check for GitHub Actions updates (#534)

Author: DataTriny

.github/dependabot.yml

@@ -0,0 +1,15 @@
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "chore"
+    groups:
+      ci:
+        patterns:
+          - "*"