build(deps): bump express from 4.21.1 to 4.21.2

Bumps [express](https://github.com/expressjs/express) from 4.21.1 to 4.21.2.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.2/History.md)
- [Commits](expressjs/express@4.21.1...4.21.2)

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

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

package.json

@@ -19,7 +19,7 @@
   "homepage": "https://github.com/endlessm/eos-activation-server",
   "dependencies": {
     "body-parser": "^1.17.1",
-    "express": "^4.21.1",
+    "express": "^4.21.2",
     "geoip-lite": "^1.2.0",
     "ioredis": "^5.4.1",
     "jsonschema": "^1.1.0",