Update README.md

[joooeoeee]

Corrected the typo in "PeckShield" (capitalized the "S") in the hyperlink.

Replaced the preposition "at" with "into" in the sentence: "Import into Solidity files:".

Replaced the verb "see" with "refer" for a more natural phrasing: "Refer to the technical paper or visit the Aave Developer docs."

Corrected a typo in the sentence: "Follow the next steps to set up the repository:".

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