fix: remove github-actions from dependabot (no workflows exist)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: DUBSOpenHub

.github/dependabot.yml

@@ -1,6 +1,2 @@
 version: 2
-updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"
+updates: []