chore: update hiro -> leather

[kyranjamie]

This PR was published to npm with the alpha versions:

• connect npm install @stacks/connect@7.4.3-alpha.0dccaab.0 --save-exact
• connect-react npm install @stacks/connect-react@22.2.3-alpha.0dccaab.0 --save-exact
• connect-ui npm install @stacks/connect-ui@6.1.4-alpha.0dccaab.0 --save-exact

Readme updates, Hiro -> Leather

_{Also couldn't help fixing a few choice passive voice phrasings 🙂}

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Latest commit: 0dccaab07c4b1ceb20c40b8962738de42d8f80e2

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Name	Status	Preview	Comments	Updated (UTC)
connect-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 30, 2023 2:36pm