build(deps-dev): bump @types/sinon from 17.0.4 to 21.0.0 (#516)

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

Author: dependabot[bot]

package-lock.json

@@ -53,7 +53,7 @@
     "@types/markup-js": "^1.5.0",
     "@types/mocha": "^10.0.10",
     "@types/node": "^24.10.0",
-    "@types/sinon": "^17.0.4",
+    "@types/sinon": "^21.0.0",
     "@vercel/ncc": "^0.38.3",
     "c8": "^10.1.3",
     "chai": "^6.2.0",