Minor corrections and adjustments

[alex-y-z]

Changes

Fixed an assortment of typos and inconsistencies.

Checks

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[IgnisRBX]

Hi @alex-y-z
Super appreciative for your submission! We're no longer processing API page updates through .yaml files in this repo (.md files are still fine). I'm going to manually apply your suggestions though, so all of these will make their way into the docs. :)

Feel free to still submit corrections to .yaml files in the short term if you have any, and I'll process them in batches. Alternatively, you can file a docs bug report at https://devforum.roblox.com/c/bug-reports/documentation-issues/72 and we'll take care of it.