[Snyk] Upgrade contentstack from 3.15.2 to 3.15.3#18

snyk-bot wants to merge 1 commit intomastercontentstack/contentstack-nextjs-ssg-starter-app:masterfrom

snyk-upgrade-34c387c92464cb5e68e50f1ffc628e38contentstack/contentstack-nextjs-ssg-starter-app:snyk-upgrade-34c387c92464cb5e68e50f1ffc628e38Copy head branch name to clipboard