Bump @sap/xssec and @sap/approuter in /03-workplace-management/approu…

…ter (#20)

Bumps @sap/xssec to 3.6.1 and updates ancestor dependency @sap/approuter. These dependencies need to be updated together.


Updates `@sap/xssec` from 3.2.10 to 3.6.1

Updates `@sap/approuter` from 10.10.4 to 10.15.4

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

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