Bump body-parser and express in /examples/radix-example-oauth-proxy/api

Bumps [body-parser](https://github.com/expressjs/body-parser) to 1.20.3 and updates ancestor dependency [express](https://github.com/expressjs/express). These dependencies need to be updated together.


Updates `body-parser` from 1.20.2 to 1.20.3
- [Release notes](https://github.com/expressjs/body-parser/releases)
- [Changelog](https://github.com/expressjs/body-parser/blob/master/HISTORY.md)
- [Commits](expressjs/body-parser@1.20.2...1.20.3)

Updates `express` from 4.19.2 to 4.21.1
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.1/History.md)
- [Commits](expressjs/express@4.19.2...4.21.1)

---
updated-dependencies:
- dependency-name: body-parser
  dependency-type: indirect
- dependency-name: express
  dependency-type: direct:production
...

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

examples/radix-example-oauth-proxy/api/package.json

@@ -10,7 +10,7 @@
   "license": "ISC",
   "dependencies": {
     "jsonwebtoken": "^9.0.2",
-    "express": "^4.19.2",
+    "express": "^4.21.1",
     "node-fetch": "^2.7.0"
   }
 }