fix: make Conceal a little brighter. Fixes folke#70

lua/tokyonight/theme.lua

@@ -17,7 +17,7 @@ function M.setup(config)
   theme.base = {
     Comment = { fg = c.comment, style = config.commentStyle }, -- any comment
     ColorColumn = { bg = c.black }, -- used for the columns set with 'colorcolumn'
-    Conceal = { fg = c.dark3 }, -- placeholder characters substituted for concealed text (see 'conceallevel')
+    Conceal = { fg = c.dark5 }, -- placeholder characters substituted for concealed text (see 'conceallevel')
     Cursor = { fg = c.bg, bg = c.fg }, -- character under the cursor
     lCursor = { fg = c.bg, bg = c.fg }, -- the character under the cursor when |language-mapping| is used (see 'guicursor')
     CursorIM = { fg = c.bg, bg = c.fg }, -- like Cursor, but used when in IME mode |CursorIM|