chore: disable dependabot

.github/dependabot.yml

@@ -1,11 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: pip
-    directory: '/backend'
-    schedule:
-      interval: weekly
-  - package-ecosystem: 'github-actions'
-    directory: '/'
-    schedule:
-      # Check for updates to GitHub Actions every week
-      interval: 'weekly'