replaced unaccesible link from intro to ethereum page

[cd-sigma]

Description

• Removed unaccessible link from the intro to Ethereum page and replaced it with the working one.
• The previous link used a domain that was expired, so replaced it with a link of the medium article directly.

Screenshots

Related Issue

https://github.com/ethereum/ethereum-org-website/issues/13209

[netlify[bot]]

✅ Deploy Preview for ethereumorg ready!

Name	Link
🔨 Latest commit	be80c21d3d628926eb47222875512d92c779bb71
🔍 Latest deploy log	https://app.netlify.com/sites/ethereumorg/deploys/667488909ac5900008f964bc
😎 Deploy Preview	https://deploy-preview-13217--ethereumorg.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	7 paths audited Performance: 45 (🔴 down 2 from production) Accessibility: 92 (no change from production) Best Practices: 83 (🔴 down 9 from production) SEO: 93 (no change from production) PWA: - View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[corwintines]

@all-contributors can you add @cd-sigma for content

[allcontributors[bot]]

@corwintines

I've put up a pull request to add @cd-sigma! :tada:

[gitpoap-bot[bot]]

Congrats, your important contribution to this open-source project has earned you a GitPOAP!

Be sure to join the Ethereum.org discord if you are interested in contributing further to the project or have any questions for the team.

GitPOAP: 2024 Ethereum.org Contributor:

Head to gitpoap.io & connect your GitHub account to mint!

Learn more about GitPOAPs here.