fix: upgrade @types/react from 18.2.15 to 18.2.21

Snyk has created this PR to upgrade @types/react from 18.2.15 to 18.2.21.

See this package in npm:
https://www.npmjs.com/package/@types/react

See this project in Snyk:
https://app.snyk.io/org/contentstack-ghost/project/e48227ed-fe1d-4e8a-9606-3aee8c8c77ae?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -8,7 +8,7 @@
     "@contentstack/live-preview-utils": "^1.4.0",
     "@contentstack/utils": "^1.3.0",
     "@textea/json-viewer": "^3.1.1",
-    "@types/react": "^18.2.15",
+    "@types/react": "^18.2.21",
     "html-react-parser": "^3.0.16",
     "moment": "^2.29.4",
     "nth-check": "^2.1.1",