Setup Weekly Automation to Update @actions/github (#498)

* create automation to update Octokit for actions toolkit

Co-authored-by: Dependency Update Bot <bot@github.com>
Co-authored-by: Shohei Ueda <30958501+peaceiris@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

package.json

@@ -38,10 +38,10 @@
     "url": "https://github.com/actions/toolkit/issues"
   },
   "dependencies": {
-    "@actions/http-client": "^1.0.3",
-    "@octokit/core": "^2.5.1",
-    "@octokit/plugin-paginate-rest": "^2.2.0",
-    "@octokit/plugin-rest-endpoint-methods": "^3.10.0"
+    "@actions/http-client": "^1.0.8",
+    "@octokit/core": "^3.0.0",
+    "@octokit/plugin-paginate-rest": "^2.2.3",
+    "@octokit/plugin-rest-endpoint-methods": "^4.0.0"
   },
   "devDependencies": {
     "jest": "^25.1.0",