Bump @sap/approuter

Bumps the all-npm-dependencies group with 1 update in the /app directory: @sap/approuter.


Updates `@sap/approuter` from 20.5.3 to 20.5.4

---
updated-dependencies:
- dependency-name: "@sap/approuter"
  dependency-version: 20.5.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all-npm-dependencies
...

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

Author: dependabot[bot]