use green.6 for fgColor-success

Author: lukasoppermann

src/tokens/functional/color/light/primitives-light.json5

@@ -136,7 +136,7 @@
       },
     },
     success: {
-      $value: '{base.color.green.5}',
+      $value: '{base.color.green.6}',
       $type: 'color',
       $extensions: {
         'org.primer.figma': {