feat: update README for aurora neovim theme installation

Updated the README.md file to clarify the installation instructions
for the aurora neovim theme using `lazy.nvim`. This change improves
the documentation by specifying the theme name explicitly.

README.md

@@ -2,7 +2,7 @@
 
 ## Installation
 
-To install aurora.nvim using `lazy.nvim`, add the following to your plugin configuration:
+To install aurora neovim theme using `lazy.nvim`, add the following to your plugin configuration:
 
 ```lua
 {