fix: typo in README

Author: Enzodtz

README.md

@@ -89,8 +89,8 @@ M.base_30 = {
   darker_black = "", -- 6% darker than black
   black2 = "", -- 6% lighter than black
   one_bg = "", -- 10% lighter than black
-  one_bg2 = "", -- 6% lighter than one_bg2
-  one_bg3 = "", -- 6% lighter than one_bg3
+  one_bg2 = "", -- 6% lighter than one_bg
+  one_bg3 = "", -- 6% lighter than one_bg2
   grey = "", -- 40% lighter than black (the % here depends so choose the perfect grey!)
   grey_fg = "", -- 10% lighter than grey
   grey_fg2 = "", -- 5% lighter than grey