chore(deps): update dependency sinon to v21 (#804)

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

Author: renovate[bot]

package-lock.json

@@ -39,7 +39,7 @@
     "glob": "^11.0.0",
     "prettier": "3.5.3",
     "semantic-release-plugin-update-version-in-files": "^2.0.0",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "sort-keys": "^6.0.0",
     "string-to-jsdoc-comment": "^1.0.0",
     "typescript": "^5.0.0",