Comment Color Brightness

-> Please see nordtheme/nord#94 for all
   details about this design change decision.

Increased the comment color (`nord3`) brightness by 10% from a lightness
level of ~35% to ~45%.

GH-6

styles/variables.less

@@ -47,7 +47,7 @@
 @editor-gutter-background-color-selected: transparent;
 @editor-gutter-icon-folded-color: @nord8;
 @editor-gutter-icon-open-color: @nord2;
-@editor-gutter-icon-open-hover-color: @nord3;
+@editor-gutter-icon-open-hover-color: @nord3-brightened;
 @editor-gutter-text-color: fade(@editor-text-color, 40%);
 @editor-gutter-text-color-selected: @nord6;
 
@@ -64,7 +64,7 @@
 @editor-syntax-color-annotation: @nord12;
 @editor-syntax-color-attribute: @nord7;
 @editor-syntax-color-class: @nord7;
-@editor-syntax-color-comment: @nord3;
+@editor-syntax-color-comment: @nord3-brightened;
 @editor-syntax-color-function: @nord8;
 @editor-syntax-color-keyword: @nord9;
 @editor-syntax-color-method: @nord8;