EDU-8: Fixes minor issues

[fairlydurable]

• Repaired two links to point to maven blob
• Fixed several typos and one repeated word

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Name	Status	Preview	Comments	Updated (UTC)
temporal-learning	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 13, 2024 8:27pm

[fairlydurable]

Work seems to have been done by @MasonEgger already, including Maven port.