Bump body-parser and @sap/approuter in /code/router

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


Updates `body-parser` from 1.20.0 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@1.20.0...1.20.3)

Updates `@sap/approuter` from 16.6.2 to 16.9.0

---
updated-dependencies:
- dependency-name: body-parser
  dependency-type: indirect
- dependency-name: "@sap/approuter"
  dependency-type: direct:production
...

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

code/router/package.json

@@ -1,7 +1,7 @@
 {
   "name": "susaas-approuter",
   "dependencies": {
-    "@sap/approuter": "^16.6.2"
+    "@sap/approuter": "^16.9.0"
   },
   "engines": {
     "node": "^18.x"