Updated Irys guide to use latest SDK

[lukecd]

Description

We recently updated out SDK at Irys, this PR updates the code examples to use the latest Irys SDK and also the latest Lit SDK

General

• [X ] I have performed a self-review of my code
• [X ] I have fixed all grammar issues (can use an AI tool to check), and explanations are in active voice
• [X ] I have checked the additions are concise
• [ X] Language is consistent with existing documentation
• [ X] My changes generate no new warnings
• [ X] Any dependent changes have been merged and published (ie. SDK changes, node dependencies)

If I have added a new concept, I have

• [X ] included a beginner friendly explanation
• [X ] included a basic technical introduction and code sample
• [ X] new terms are defined, both in relevant new pages and in the glossary

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Name	Status	Preview	Comments	Updated (UTC)
docs-main-v2	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 27, 2024 9:01am

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