fix: upgrade gatsby from 5.0.0 to 5.12.3

Snyk has created this PR to upgrade gatsby from 5.0.0 to 5.12.3.

See this package in npm:
https://www.npmjs.com/package/gatsby

See this project in Snyk:
https://app.snyk.io/org/sammyfilly/project/af737f69-1615-4ff8-88ef-8864ae118b27?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

starters/gatsby-starter-minimal-ts/package.json

@@ -17,7 +17,7 @@
   },
   "license": "0BSD",
   "dependencies": {
-    "gatsby": "^5.0.0",
+    "gatsby": "^5.12.3",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"
   },