fix: unblock release by upgrading @types/sinon for mapmanagement package (#8674)

* Upgrade sinon types

* fix: unblock release by upgrading @types/sinon for mapmanagement package

Author: danieljbruce

packages/google-maps-mapmanagement/package.json

@@ -50,7 +50,7 @@
   "devDependencies": {
     "@types/mocha": "^10.0.10",
     "@types/node": "^22.13.9",
-    "@types/sinon": "^17.0.4",
+    "@types/sinon": "^21.0.1",
     "c8": "^10.1.3",
     "gapic-tools": "^1.0.0",
     "gts": "^6.0.2",