Remove extraneous dependabot config, add github actions (rjsf-team#1858)

* Remove extraneous dependabot config * Update dependabot.yml

Author: epicfaace

.github/dependabot.yml

@@ -10,27 +10,7 @@ updates:
  schedule:
  interval: "daily"
 
- - package-ecosystem: "npm"
- directory: "packages/antd"
- schedule:
- interval: "daily"
-
- - package-ecosystem: "npm"
- directory: "packages/core"
- schedule:
- interval: "daily"
-
- - package-ecosystem: "npm"
- directory: "packages/fluent-ui"
- schedule:
- interval: "daily"
- 
- - package-ecosystem: "npm"
- directory: "packages/playground"
- schedule:
- interval: "daily"
- 
- - package-ecosystem: "npm"
- directory: "packages/semantic-ui"
+ - package-ecosystem: "github-actions"
+ directory: "/"
  schedule:
  interval: "daily"