fix(Outlines): use correct uniform type

[CodyJasonBennett]

Fixes #2043, where expo-gl will not accept coerced values for uniforms.

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Name	Status	Preview	Comments	Updated (UTC)
drei	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 23, 2024 10:47pm

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:tada: This PR is included in version 9.109.2 :tada:

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