Bump @sap/cds-dk from 9.4.2 to 9.6.1

Bumps [@sap/cds-dk](https://cap.cloud.sap/) from 9.4.2 to 9.6.1.

---
updated-dependencies:
- dependency-name: "@sap/cds-dk"
  dependency-version: 9.6.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]