docs(README): clarify options.transparent (#327)

Resolves: #327

README.md

@@ -259,7 +259,7 @@ require('github-theme').setup({
     compile_file_suffix = '_compiled', -- Compiled file suffix
     hide_end_of_buffer = true, -- Hide the '~' character at the end of the buffer for a cleaner look
     hide_nc_statusline = true, -- Override the underline style for non-active statuslines
-    transparent = false,       -- Disable setting background
+    transparent = false,       -- Disable setting bg (make neovim's background transparent)
     terminal_colors = true,    -- Set terminal colors (vim.g.terminal_color_*) used in `:terminal`
     dim_inactive = false,      -- Non focused panes set to alternative background
     module_default = true,     -- Default enable value for modules