gas optimisation in Yul based ERC20 Example

[Akkii4]

using shr opcode (costs 3 gas) instead of div (cost 5 gas)

[github-actions]

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[mehtavishwa30]

Hey @Akkii4!

Thanks for the taking the time to contribute to improving our docs. However, the proposed change does not align with our purpose for the Solidity docs. With the examples in the official documentation, we aim to provide a reference for the usage of the Solidity language. Optimisations like the one proposed, although not incorrect, might not be the most relevant to the example.

For this reason, I will be closing the PR but encourage you to continue providing us feedback as a docs reader and language user to help us improve the docs. If you come across buggy or incorrect references in the documentation, feel free to open an issue and discuss the proposed solution with the team. We can then assign it to you to begin working on the PR. :)