Keep github actions up to date thanks to dependabot.

.github/dependabot.yaml

@@ -0,0 +1,12 @@
+# https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates
+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    labels:
+      - "CI/CD"
+    assignees:
+      - "kdeldycke"