build(deps-dev): bump sinon from 21.0.2 to 21.0.3 (#583)

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

Author: dependabot[bot]

package-lock.json

@@ -53,7 +53,7 @@
     "@types/node": "^24.12.0",
     "@types/sinon": "^21.0.0",
     "@vercel/ncc": "^0.38.4",
-    "sinon": "^21.0.2",
+    "sinon": "^21.0.3",
     "typescript": "^5.9.3"
   }
 }