Update EIP-721: delete broken openzeppelin links#5903

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konojunya wants to merge 2 commits intoethereum:masterfrom konojunya:docs/fix-erc721-openzeppelin-link

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Commits on Nov 9, 2022

docs: ERC721 implemention link correction
konojunya
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Commits on Nov 19, 2022

fix: delete openzeppelin link
konojunya
committed