Add an example link to slice extension reference page

[Kruger77]

Updated with the template for Slice Extension

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
gdevelop-wiki	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 12, 2024 6:09am

[Bouh]

We cannot write on this page, every change will be erased by a next update of the engine nor extension description.
If you want to add an example link, maybe it should be better to do it in the description of the extension.

As you can see there is a message at bottom of the page.

This page is an auto-generated reference page about the Slice an object into pieces extension, made by the community of GDevelop, the open-source, cross-platform game engine designed for everyone. Learn more about all GDevelop community-made extensions here.