Update README.md lazy install

Fixed to declare variables inline as per lazy convention

README.md

@@ -147,21 +147,16 @@ vim +PluginInstall +qall
 #### Installation using [Lazy](https://github.com/folke/lazy.nvim)
 
 Add repository within `require('lazy').setup` call in your vimrc (or for plugins file ie. /lua/plugins/, do the same within a `return{}` statement)
-{
-'vimwiki/vimwiki'
-}
-
-Declare global variables **before** plugins are loaded (above `require('lazy').setup({}`),
-
-For example:
-
 ``` lua
--- Set markdown as default in vimwiki folder in home
+{
-vim.g.vimwiki_path = '~/vimwiki/'
+  'vimwiki/vimwiki',
-vim.g.vimwiki_syntax = 'markdown'
+  init = function()
-vim.g.vimwiki_ext = 'md'
+    vim.g.vimwiki_path = '~/vimwiki/'
+    vim.g.vimwiki_syntax = 'markdown'
+    vim.g.vimwiki_ext = 'md'
+  end,
+}
 ```
-
 #### Manual Install
 
 Download the [zip archive](https://github.com/vimwiki/vimwiki/archive/dev.zip)