chore(deps): update dependency knip to v6

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -92,7 +92,7 @@
     "eslint-plugin-simple-import-sort": "12.1.1",
     "eslint-plugin-tsdoc": "0.5.2",
     "globals": "^17.0.0",
-    "knip": "5.86.0",
+    "knip": "6.4.1",
     "libxmljs2": "^0.35||^0.37",
     "mkdirp": "^3.0.1",
     "mocha": "11.7.5",