Fix meeting date and reword About page

[democat3457]

• Correct meeting date from July 10 to July 20
• Reword a couple sentences for clarity / consistency

Pairs with #24

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Name	Status	Preview	Comments	Updated (UTC)
dallas-area-transit-alliance	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 31, 2024 5:47am

[LEQUI000]

About page flows much more nicely and more context + clarity added