fix(halo-theme): change dataviz-color2 to enhance visible for print (#1229)

Co-authored-by: Sarin Udompanish <[email protected]>

Author: Sarin-Udompanish

packages/halo-theme/src/variants/dark/overrides.less

@@ -177,7 +177,7 @@ Rules:
 
 // DataViz - Charting
 @dataviz-color-1                          : @dataviz-color-primary;
-@dataviz-color-2                          : @color-white;
+@dataviz-color-2                          : @color-mercury;
 @dataviz-color-3                          : @color-supernova;
 @dataviz-color-4                          : @color-amethyst;
 @dataviz-color-5                          : @color-robins-egg;