Fixed a typo in the readme that bugged me (#1527)

Author: ItsLiyua

README.md

@@ -2,7 +2,7 @@
 <img src="https://github.com/nvimdev/lspsaga.nvim/assets/41671631/682a189e-6571-48f8-af1c-1e52142c7071" width="20%" height="20%"/>
 </div>
 
-improve lsp experences in neovim
+Improve lsp experiences in neovim
 
 [![](https://img.shields.io/badge/Element-0DBD8B?style=for-the-badge&logo=element&logoColor=white)](https://matrix.to/#/#lspsaga-nvim:matrix.org)