Bump @sap/cds from 6.1.3 to 8.6.0 in /samples/cds-sample-application

Bumps [@sap/cds](https://cap.cloud.sap/) from 6.1.3 to 8.6.0.

---
updated-dependencies:
- dependency-name: "@sap/cds"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

samples/cds-sample-application/package-lock.json

@@ -31,7 +31,7 @@
     "@nestjs/common": "^8.4.7",
     "@nestjs/core": "^8.4.7",
     "@nestjs/platform-express": "^8.4.7",
-    "@sap/cds": "6.1.3",
+    "@sap/cds": "8.6.0",
     "@sap/cds-dk": "7.9.4",
     "passport": "^0.7.0",
     "reflect-metadata": "^0.1.14",