tweak: stretched number opacity on the grades

addons/majority_judgment/shaders/linear_grade.shader

@@ -35,7 +35,7 @@ void fragment() {
 	vec4 texture_color_base = texture(grade_icon, UV);
 	final_color.rgb = mix(
 		final_color.rgb,
-		final_color.rgb * 0.80,
+		final_color.rgb * 0.85,
 		texture_color_base.a
 	);