Revert "fix(color): fix L1 black color description"

This reverts commit 4195ba5.

Author: gcornut

packages/lumx-core/style-dictionary/properties/core/color.json

@@ -6,7 +6,7 @@
                 "value": "#000000",
                 "opacity": "0.7",
                 "version": "0.22",
-                "comment": "Base dark color with 70% opacity"
+                "comment": "Base dark color with 80% opacity"
             },
             "L2": {
                 "value": "#000000",