renderer_vulkan: Fix flipped screenshot

src/video_core/renderer_vulkan/renderer_vulkan.cpp

@@ -1021,11 +1021,16 @@ void RendererVulkan::RenderScreenshot() {
                 .dstAccessMask = vk::AccessFlagBits::eMemoryRead | vk::AccessFlagBits::eMemoryWrite,
             };
 
-            const std::array offsets = {
+            const std::array src_offsets = {
                 vk::Offset3D{0, 0, 0},
                 vk::Offset3D{static_cast<s32>(width), static_cast<s32>(height), 1},
             };
 
+            const std::array dst_offsets = {
+                vk::Offset3D{0, static_cast<s32>(height), 0},
+                vk::Offset3D{static_cast<s32>(width), 0, 1},
+            };
+
             const vk::ImageBlit blit_area = {
                 .srcSubresource{
                     .aspectMask = vk::ImageAspectFlagBits::eColor,
@@ -1033,14 +1038,14 @@ void RendererVulkan::RenderScreenshot() {
                     .baseArrayLayer = 0,
                     .layerCount = 1,
                 },
-                .srcOffsets = offsets,
+                .srcOffsets = src_offsets,
                 .dstSubresource{
                     .aspectMask = vk::ImageAspectFlagBits::eColor,
                     .mipLevel = 0,
                     .baseArrayLayer = 0,
                     .layerCount = 1,
                 },
-                .dstOffsets = offsets,
+                .dstOffsets = dst_offsets,
             };
 
             cmdbuf.pipelineBarrier(vk::PipelineStageFlagBits::eAllCommands,