chore(deps): update dependency sinon to v21 (#812)

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

Author: renovate[bot]

package-lock.json

@@ -39,7 +39,7 @@
     "prettier": "3.5.3",
     "publint": "0.3.12",
     "semantic-release": "24.2.5",
-    "sinon": "20.0.0",
+    "sinon": "21.0.0",
     "stream-buffers": "3.0.3",
     "tempy": "3.1.0",
     "testdouble": "3.20.2"