Broken link to `@uniform` in docs

The link to `@uniform` in the docs is [broken](https://juliagpu.gitlab.io/KernelAbstractions.jl/api/@ref). Maybe we can/should set `strict = true` in the docs?

Start by checking the documentation source and its configuration for the broken @uniform link and the possible strict = true setting. Verify how the link is generated, then confirm the documentation build produces a working @uniform link without introducing other broken references.

Written by the indexing model from the issue text.