message: Update version of VK_EXT_debug_marker in manifest
diff: "device_extensions": [
  {
  "name": "VK_EXT_debug_marker",
  - "spec_version": "3",
  + "spec_version": "4",
  "entrypoints": ["vkDebugMarkerSetObjectTagEXT",
  "vkDebugMarkerSetObjectNameEXT",
  "vkCmdDebugMarkerBeginEXT",
  