Update examples to match styling

[FeudalDiana]

Changes

Updated names to match official Roblox Lua Styling guide for consistency.
Apologies for the multiple commits due to web editor.

https://roblox.github.io/lua-style-guide/#naming

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[IgnisRBX]

Thanks for the pull request! I just reverted playerId to playerID since "ID" as an abbreviation for "identification" reads a bit better IMO than "Id" (and yes, I admit there is inconsistency across the site for this, with some APIs including "...Id...", but let's stick with "ID". :) )

[Bottersnike]

@IgnisRBX The style guide suggests

For acronyms within names, don't capitalize the whole thing. For example, aJsonVariable or MakeHttpCall.

The exception to this is when the abbreviation represents a set. For example, in anRGBValue or GetXYZ. In these cases, RGB should be treated as an abbreviation of RedGreenBlue and not as an acronym.

Id would be a contraction of Identification (or similar) which doesn't qualify for the only listed exception. Further, Id is used rather than ID across Roblox APIs (eg GetStudioUserId) so it stands that this convention should be followed in all places?