readme : update link to use main version of llama.vim (#32)

Author: jph00

README.md

@@ -81,7 +81,7 @@ for the full list of options.
 
 ### llama.cpp setup
 
-The plugin requires a [llama.cpp](https://github.com/ggerganov/llama.cpp) server instance to be running at [`g:llama_config.endpoint`](https://github.com/ggml-org/llama.vim/blob/7d3359077adbad4c05872653973c3ceb09f18ad9/autoload/llama.vim#L34-L36)
+The plugin requires a [llama.cpp](https://github.com/ggerganov/llama.cpp) server instance to be running at [`g:llama_config.endpoint`](https://github.com/ggml-org/llama.vim/blob/master/autoload/llama.vim#L37).
 
 #### Mac OS