chore(examples): upgrade date-fns in cms-tina (vercel#41240)

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## Bug

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Co-authored-by: snyk-bot <snyk-bot@snyk.io>
Co-authored-by: Balázs Orbán <info@balazsorban.com>

examples/cms-tina/package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "@tinacms/cli": "^0.60.16",
     "classnames": "2.3.1",
-    "date-fns": "2.28.0",
+    "date-fns": "2.29.3",
     "gray-matter": "4.0.3",
     "next": "latest",
     "react": "^17.0.2",