build(deps-dev): bump express from 4.19.2 to 4.21.0 (#255)

Bumps [express](https://github.com/expressjs/express) from 4.19.2 to 4.21.0.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.0/History.md)
- [Commits](expressjs/express@4.19.2...4.21.0)

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

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

Author: dependabot[bot]

cli/publish-spec/package.json

@@ -59,7 +59,7 @@
     "@types/node": "^22.5.2",
     "@types/node-fetch": "^2.6.11",
     "@types/prompts": "^2.4.9",
-    "express": "^4.19.2",
+    "express": "^4.21.0",
     "multer": "1.4.5-lts.1",
     "picocolors": "^1.1.0",
     "tsx": "^4.19.0",