Enable dependabot for github workflows

Signed-off-by: Vincent Demeester <[email protected]>

Author: vdemeester

.github/dependabot.yml

@@ -16,3 +16,7 @@ updates:
       interval: "weekly"
       # Disable all pull requests for Docker dependencies
     open-pull-requests-limit: 0
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"