Fix CRT-NewPixie semantics.

[vanfanel]

When CRT-NewPixie is used, these warnings appear on screen:

vkBasalt err:   /root/reshade-shaders/Shaders/CRT-NewPixie.fx(274, 1): warning X4576: 'PS_NewPixie_Accum': input parameter 'uv' semantic does not match vertex shader one
vkBasalt err:   /root/reshade-shaders/Shaders/CRT-NewPixie.fx(280, 1): warning X4576: 'PrevColor': input parameter 'uv' semantic does not match vertex shader one
vkBasalt err:   /root/reshade-shaders/Shaders/CRT-NewPixie.fx(286, 1): warning X4576: 'PS_NewPixie_Blur': input parameter 'uv_tx' semantic does not match vertex shader one
vkBasalt err:   /root/reshade-shaders/Shaders/CRT-NewPixie.fx(293, 1): warning X4576: 'PS_NewPixie_Final': input parameter 'uv_tx' semantic does not match vertex shader one

This PR silences those warnings by updating the semantics to the correct ones.