ci: bump sinon from 20.0.0 to 21.0.0 (#647)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -70,7 +70,7 @@
     "lint-staged": "^16.0.0",
     "mocha": "^11.0.1",
     "prettier": "^3.2.5",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "sinon-chai": "^4.0.0",
     "yargs": "^18.0.0"
   },