build(deps): bump express from 4.19.2 to 4.21.0

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:production
  update-type: version-update:semver-minor
...

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

packages/apps/shopify-api/package.json

@@ -98,7 +98,7 @@
     "@types/node-fetch": "^2.6.11",
     "@types/uuid": "^10.0.0",
     "expect": "^29.7.0",
-    "express": "^4.19.2",
+    "express": "^4.21.0",
     "jest-environment-miniflare": "^2.14.3",
     "miniflare": "^3.20240925.0",
     "rollup": "^4.22.4",

packages/apps/shopify-app-express/package.json

@@ -46,7 +46,7 @@
     "@shopify/shopify-app-session-storage": "^3.0.7",
     "@shopify/shopify-app-session-storage-memory": "^4.0.7",
     "cookie-parser": "^1.4.6",
-    "express": "^4.19.2",
+    "express": "^4.21.0",
     "semver": "^7.6.2"
   },
   "devDependencies": {