chore(deps): bump knip from 5.85.0 to 6.3.0 in /tools/test-dependencies

Bumps [knip](https://github.com/webpro-nl/knip/tree/HEAD/packages/knip) from 5.85.0 to 6.3.0.
- [Release notes](https://github.com/webpro-nl/knip/releases)
- [Commits](https://github.com/webpro-nl/knip/commits/knip@6.3.0/packages/knip)

---
updated-dependencies:
- dependency-name: knip
  dependency-version: 6.3.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

tools/test-dependencies/package.json

@@ -6,6 +6,6 @@
     "node": ">=20.18"
   },
   "dependencies": {
-    "knip": "5.85.0"
+    "knip": "6.3.0"
   }
 }