fix: change color (#994)

Author: itssharmasandeep

projects/assets-library/assets/styles/_color-palette.scss

@@ -100,8 +100,8 @@ $color-health-unknown: $gray-7;
 // Risk
 $color-risk-critical: $purple-6;
 $color-risk-high: $red-5;
-$color-risk-medium: $brown-1;
-$color-risk-low: $gray-6;
+$color-risk-medium: $orange-4;
+$color-risk-low: $yellow-4;
 
 // Status
 $color-status-success: $green-2;