Update readme.md

[akhilmanga]

I have added latest 28hr course => ultimate solidity smart contract course with latest foundry framework. (Including AI).

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Summary by CodeRabbit

• Documentation: Added a new resource to the list of Solidity tutorials in Blockchain/readme.md. This is a comprehensive course on blockchain development with Solidity, providing users with an additional learning tool to enhance their understanding and skills in blockchain development.

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Walkthrough

This change introduces an additional resource to the list of Solidity tutorials in the Blockchain readme file. The new addition is a comprehensive course on blockchain development using Solidity, enriching the learning resources for users.

Changes

File	Summary
Blockchain/readme.md	Added a full course on blockchain development with Solidity to the list of tutorials and resources

🐇🎉

A new course we add, oh what a sight,

For those who code deep into the night.

With Solidity, we'll build and play,

In the blockchain world, we'll make our way! 🚀

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Files that changed from the base of the PR and between b6f12e2 and 842bc25.

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• Blockchain/readme.md (1 hunks)

Files skipped from review due to trivial changes (1)

• Blockchain/readme.md