clear up a minor inconsistency in default effect naming

build/data/libobs/default.effect

@@ -41,7 +41,7 @@ technique DrawRGB
 	}
 }
 
-technique DrawYUVToRGB
+technique DrawYUV
 {
 	pass
 	{

libobs/obs-source.c

@@ -440,7 +440,7 @@ static void obs_source_draw_texture(texture_t tex, struct source_frame *frame)
 {
 	effect_t    effect = obs->video.default_effect;
 	bool        yuv    = is_yuv(frame->format);
-	const char  *type  = yuv ? "DrawYUVToRGB" : "DrawRGB";
+	const char  *type  = yuv ? "DrawYUV" : "DrawRGB";
 	technique_t tech;
 	eparam_t    param;