Update links

[SaschaWillems]

This PR updates a few of the links to point at current resources:

• Remove no longer maintained link to the Vulkan reference
• Update Vulkan spec link to the chunked 1.3 version
• Add link to the Khronos Vulkan Guide
• Update links in the tutorial chapters to the current Vulken 1.3 chunked spec

[SaschaWillems]

Thanks for the suggested changes. I have updated the links accordingly and also updated them to point at the Vulkan 1.3 spec.