vulkan-headers 1.4.321.0 (downgrade)

[cho-m]

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I've been trying to switch us to SDK tags but missed the timing whenever they aligned.

So just downgrading us. Due to extra .0, I think we should be able to upload new bottle without revision.

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The SDK tags are the versions upstream distribute as official releases at https://vulkan.lunarg.com/

From Repology (https://repology.org/project/vulkan-headers/versions), SDK tags are versions used by most major repositories, e.g.

• Alpine
• Arch Linux
• Fedora
• Gentoo
• GNU Guix
• MacPorts
• nixpkgs
• OpenBSD Ports
• Vcpkg
• Void Linux
• Also Debian/Ubuntu but not listed on that page.

While repositories on 1.4.326 include us, Chimera Linux, Exherbo, KaOS, openmamba, Ravenports and Termux.

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These are better tested with compatibility with other tooling like SPIRV formulae.

Also, if we align SPIRV and Vulkan formulae, then can drop some known_good handling, e.g.

homebrew-core/Formula/v/vulkan-validationlayers.rb

Lines 41 to 51 in eab57db

	# https://github.com/KhronosGroup/Vulkan-ValidationLayers/blob/v#{version}/scripts/known_good.json#L32
	resource "SPIRV-Headers" do
	url "https://github.com/KhronosGroup/SPIRV-Headers.git",
	revision: "e6d5e88c07cc66a798b668945e7fb29ec1cfee27"
	end
	# https://github.com/KhronosGroup/Vulkan-ValidationLayers/blob/v#{version}/scripts/known_good.json#L46
	resource "SPIRV-Tools" do
	url "https://github.com/KhronosGroup/SPIRV-Tools.git",
	revision: "fda5a216e9d25fa2eeda73ec8436b96e395ce5d5"
	end

[github-actions]

@cho-m has requested bottles to be published to this PR.

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