docs: Update VK_EXT_legacy_vertex_attributes entries
What does this MR do and why?
VK_EXT_legacy_vertex_attributes was enabled for both Anv and Turnip but this never fully made its way to the docs.
CC @zmike
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VK_EXT_legacy_vertex_attributes was enabled for both Anv and Turnip but this never fully made its way to the docs.
CC @zmike