Roll external/spirv-headers/ 05cc48658..8b246ff75 (2 commits)

KhronosGroup/SPIRV-Headers@05cc486...8b246ff

$ git log 05cc48658..8b246ff75 --date=short --no-merges --format='%ad %ae %s'
2024-03-01 rlocatti Add SPV_NV_raw_access_chains (KhronosGroup#417)
2024-02-28 viktoria.maksimova Headers support for SPV_INTEL_maximum_registers extension (KhronosGroup#416)

Created with:
  roll-dep external/spirv-headers

DEPS

@@ -13,7 +13,7 @@ vars = {
   'protobuf_revision': 'v21.12',
 
   're2_revision': '108914d28a79243d4300e7e651cd0a0d5883ca0f',
-  'spirv_headers_revision': '05cc486580771e4fa7ddc89f5c9ee1e97382689a',
+  'spirv_headers_revision': '8b246ff75c6615ba4532fe4fde20f1be090c3764',
 }
 
 deps = {