Bump formidable from 3.2.4 to 3.5.4 in /examples/web

Bumps [formidable](https://github.com/node-formidable/formidable) from 3.2.4 to 3.5.4.
- [Release notes](https://github.com/node-formidable/formidable/releases)
- [Changelog](https://github.com/node-formidable/formidable/blob/master/CHANGELOG.md)
- [Commits](https://github.com/node-formidable/formidable/commits)

---
updated-dependencies:
- dependency-name: formidable
  dependency-version: 3.5.4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

examples/web/package-lock.json

@@ -5,7 +5,7 @@
   "main": "server.js",
   "dependencies": {
     "express": "^4.21.2",
-    "formidable": "^3.2.4"
+    "formidable": "^3.5.4"
   },
   "author": "yushulx",
   "license": "MIT"