Bump node-forge and @sap/approuter in /app

Bumps [node-forge](https://github.com/digitalbazaar/forge) to 1.3.2 and updates ancestor dependency @sap/approuter. These dependencies need to be updated together.


Updates `node-forge` from 1.3.1 to 1.3.2
- [Changelog](https://github.com/digitalbazaar/forge/blob/main/CHANGELOG.md)
- [Commits](digitalbazaar/forge@v1.3.1...v1.3.2)

Updates `@sap/approuter` from 20.8.3 to 20.8.4

---
updated-dependencies:
- dependency-name: node-forge
  dependency-version: 1.3.2
  dependency-type: indirect
- dependency-name: "@sap/approuter"
  dependency-version: 20.8.4
  dependency-type: direct:production
...

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

Author: dependabot[bot]