message: Use correct image layout for descriptor
  Fixes validation
diff: @@ -347,7 +347,7 @@ public:
  vks::initializers::descriptorImageInfo(
  sampler,
  view,
  - VK_IMAGE_LAYOUT_GENERAL);
  + VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
  std::array<VkWriteDescriptorSet, 1> writeDescriptorSets;
  writeDescriptorSets[0] = vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &texDescriptor);
  