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
  - cosmicjs from 4.1.7 to 4.3.7.
    See this package in npm: https://www.npmjs.com/package/cosmicjs
  - date-fns from 2.28.0 to 2.30.0.
    See this package in npm: https://www.npmjs.com/package/date-fns
  - remark from 14.0.2 to 14.0.3.
    See this package in npm: https://www.npmjs.com/package/remark

See this project in Snyk:
https://app.snyk.io/org/sammyfilly/project/7132d273-2020-46d4-b498-a536d14d1711?utm_source=github&utm_medium=referral&page=upgrade-pr

examples/cms-cosmic/package.json

@@ -6,15 +6,15 @@
     "start": "next start"
   },
   "dependencies": {
-    "classnames": "2.3.1",
-    "cosmicjs": "4.1.7",
-    "date-fns": "2.28.0",
+    "classnames": "2.5.1",
+    "cosmicjs": "4.3.7",
+    "date-fns": "2.30.0",
     "lazysizes": "^5.3.2",
     "next": "latest",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-imgix": "^9.5.1",
-    "remark": "14.0.2",
+    "remark": "14.0.3",
     "remark-html": "15.0.2"
   },
   "devDependencies": {