chore(deps): update dependency svelte-preprocess to v5.1.2

This MR contains the following updates:

Package	Type	Update	Change
svelte-preprocess	devDependencies	patch	5.1.1 -> 5.1.2

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Release Notes

sveltejs/svelte-preprocess (svelte-preprocess)

v5.1.2

Compare Source

• chore: mark postcss-load-config 5 as supported (3b5b1f0)

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