Bump express and @types/express

Bumps [express](https://github.com/expressjs/express) and [@types/express](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/express). These dependencies needed to be updated together.

Updates `express` from 4.21.1 to 5.1.0
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.21.1...v5.1.0)

Updates `@types/express` from 4.17.21 to 5.0.5
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/express)

---
updated-dependencies:
- dependency-name: express
  dependency-version: 5.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: "@types/express"
  dependency-version: 5.0.5
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

packages/prosemirror-lwdita-backend/package.json

@@ -48,14 +48,14 @@
     "@octokit/rest": "^21.0.2",
     "@octokit/types": "^16.0.0",
     "ajv": "^8.17.1",
-    "express": "^4.21.1",
+    "express": "^5.1.0",
     "octokit": "^4.0.2"
   },
   "devDependencies": {
     "@types/chai": "^4.3.11",
     "@types/chai-as-promised": "^8.0.2",
     "@types/cors": "^2",
-    "@types/express": "^4.17.21",
+    "@types/express": "^5.0.5",
     "@types/mocha": "^10.0.9",
     "@types/node": "^24.9.2",
     "@types/sinon": "^17.0.3",