fix: upgrade node-fetch from 2.6.8 to 2.6.9 (#1996)

Snyk has created this PR to upgrade node-fetch from 2.6.8 to 2.6.9.

See this package in npm:
https://www.npmjs.com/package/node-fetch

See this project in Snyk:
https://app.snyk.io/org/anikethsaha/project/6efe7e04-4e52-497e-8ad5-570733cc577a?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

packages/docsify-server-renderer/package-lock.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "debug": "^4.3.4",
     "docsify": "^4.13.0",
-    "node-fetch": "^2.6.8",
+    "node-fetch": "^2.6.9",
     "resolve-pathname": "^3.0.0"
   }
 }