fix: upgrade dompurify from 2.0.17 to 2.1.0

Snyk has created this PR to upgrade dompurify from 2.0.17 to 2.1.0.

See this package in npm:
https://www.npmjs.com/package/dompurify

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

@@ -17,7 +17,7 @@
   "dependencies": {
     "debug": "^4.3.0",
     "docsify": "^4.11.6",
-    "dompurify": "^2.0.17",
+    "dompurify": "^2.1.0",
     "node-fetch": "^2.6.0",
     "resolve-pathname": "^3.0.0"
   }