Bump express from 4.21.0 to 4.21.2 (#24)

Bumps [express](https://github.com/expressjs/express) from 4.21.0 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@4.21.0...4.21.2)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "ejs": "^3.1.10",
-    "express": "^4.21.0",
+    "express": "^4.21.2",
     "@launchdarkly/node-server-sdk": ">= 8.0.0"
   },
   "repository": {