build(deps-dev): bump express from 5.2.0 to 5.2.1 in /docs/v3

Bumps [express](https://github.com/expressjs/express) from 5.2.0 to 5.2.1.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@v5.2.0...v5.2.1)

---
updated-dependencies:
- dependency-name: express
  dependency-version: 5.2.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/v3/package-lock.json

@@ -21,7 +21,7 @@
   "type": "module",
   "devDependencies": {
     "cheerio": "^1.1.2",
-    "express": "^5.2.0",
+    "express": "^5.2.1",
     "glob": "^11.1.0",
     "gulp": "^5.0.1",
     "gulp-cli": "^3.1.0",