Roll external/spirv-headers/ 4bd8fc0c8..85a1ed200 (4 commits)
Roll external/spirv-headers/ 4bd8fc0c8..85a1ed200 (4 commits)

https://github.com/KhronosGroup/SPIRV-Headers/compare/4bd8fc0c8c26...85a1ed200d50

$ git log 4bd8fc0c8..85a1ed200 --date=short --no-merges --format='%ad %ae %s'
2022-10-05 dkoch Fix extension for RayTracingOpacityMicromapEXT
2022-10-04 kpet Add support for texel buffers to clspv non-semantic instruction set
2022-10-04 hugo registered ID for Shady
2022-08-23 ewerness VK_EXT_opacity_micromap

Created with:
  roll-dep external/spirv-headers

KhronosGroup/SPIRV-Tools,KhronosGroup/SPIRV-Tools,KhronosGroup/SPIRV-Tools,KhronosGroup/SPIRV-Tools,KhronosGroup/SPIRV-Tools,KhronosGroup/SPIRV-Tools,KhronosGroup/SPIRV-Tools,KhronosGroup/SPIRV-Tools