update shader to confirmed format copy

src/video_core/host_shaders/convert_d32f_to_abgr8.frag

@@ -10,5 +10,5 @@ layout(location = 0) out vec4 color;
 void main() {
     ivec2 coord = ivec2(gl_FragCoord.xy);
     float depth = textureLod(depth_tex, coord, 0).r;
-    color = vec4(depth, depth*depth, sqrt(depth), 1.0); // Convert depth to color
+    color = vec4(depth, depth, depth, 1.0);
 }