Add script also for notification-services-controller

Author: mcmire

packages/notification-services-controller/package.json

@@ -35,6 +35,7 @@
     "changelog:update": "../../scripts/update-changelog.sh @metamask/notification-services-controller",
     "changelog:validate": "../../scripts/validate-changelog.sh @metamask/notification-services-controller",
     "publish:preview": "yarn npm publish --tag preview",
+    "since-latest-release": "../../scripts/since-latest-release.sh",
     "test": "jest --reporters=jest-silent-reporter",
     "test:clean": "jest --clearCache",
     "test:verbose": "jest --verbose",