docs: update instructions for showcase

[twlite]

Changes

Status

• [x] These changes have been tested and formatted properly.
• [x] This PR includes only documentation changes, no code change.
• [ ] This PR introduces some Breaking changes.

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Name	Status	Preview	Updated (UTC)
discord-player-website	🔄 Building (Inspect)	Visit Preview	Nov 16, 2023 9:08am