fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - classnames from 2.3.1 to 2.5.1.
    See this package in npm: https://www.npmjs.com/package/classnames
  - date-fns from 2.28.0 to 2.30.0.
    See this package in npm: https://www.npmjs.com/package/date-fns

See this project in Snyk:
https://app.snyk.io/org/sammyfilly/project/62964043-523e-4be3-9a41-c06d8861ee16?utm_source=github&utm_medium=referral&page=upgrade-pr

examples/cms-umbraco-heartcore/package.json

@@ -6,8 +6,8 @@
     "start": "next start"
   },
   "dependencies": {
-    "classnames": "2.3.1",
-    "date-fns": "2.28.0",
+    "classnames": "2.5.1",
+    "date-fns": "2.30.0",
     "next": "latest",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"