fix: packages/paste-website/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-OCTOKITREQUEST-8730853

Author: snyk-bot

packages/paste-website/package.json

@@ -27,7 +27,7 @@
     "@mdx-js/react": "^1.6.22",
     "@next/bundle-analyzer": "^14.0.0",
     "@next/mdx": "^14.0.0",
-    "@octokit/core": "^5.0.1",
+    "@octokit/core": "^6.1.4",
     "@octokit/plugin-paginate-graphql": "^4.0.0",
     "@slack/web-api": "^7.0.1",
     "@supabase/supabase-js": "^2.36.0",