Roll external/spirv-headers/ 88bc5e321..38f39dae5 (1 commit)

KhronosGroup/SPIRV-Headers@88bc5e3...38f39da

$ git log 88bc5e321..38f39dae5 --date=short --no-merges --format='%ad %ae %s'
2023-11-08 115671160+spencer-lunarg Fix SPV_KHR_workgroup_memory_explicit_layout implicit declare (#388)

Created with:
  roll-dep external/spirv-headers

DEPS

@@ -13,7 +13,7 @@ vars = {
   'protobuf_revision': 'v21.12',
 
   're2_revision': '974f44c8d45242e710dc0a85a4defffdb3ce07fc',
-  'spirv_headers_revision': '88bc5e321c2839707df8b1ab534e243e00744177',
+  'spirv_headers_revision': '38f39dae5baaa24431b24ac659054ebe972fa1e6',
 }
 
 deps = {