docs(README): specify name field in lazy.nvim installation

Author: S1M0N38

README.md

@@ -116,11 +116,12 @@ Add this in your `init.lua` or `plugins.lua`
 
 ```lua
 -- Install without configuration
-{ 'projekt0n/github-nvim-theme' }
+{ 'projekt0n/github-nvim-theme', name = 'github-theme' }
 
 -- Or with configuration
 {
   'projekt0n/github-nvim-theme',
+  name = 'github-theme',
   lazy = false, -- make sure we load this during startup if it is your main colorscheme
   priority = 1000, -- make sure to load this before all the other start plugins
   config = function()