fix: upgrade debug from 4.1.1 to 4.2.0

Snyk has created this PR to upgrade debug from 4.1.1 to 4.2.0.

See this package in NPM:
https://www.npmjs.com/package/debug

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

Author: snyk-bot

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

@@ -15,7 +15,7 @@
     "test": "echo 'hello'"
   },
   "dependencies": {
-    "debug": "^4.1.1",
+    "debug": "^4.2.0",
     "docsify": "^4.11.2",
     "node-fetch": "^2.6.0",
     "resolve-pathname": "^3.0.0"