Limit autocmd to rust files

Author: rockerBOO

README.md

@@ -30,14 +30,13 @@ nnoremap <Leader>t :lua require'lsp_extensions'.inlay_hints{ only_current_line =
 Run on showing file or new file in buffer:
 
 ```vimscript
-autocmd! * <buffer>
-autocmd BufEnter,BufWinEnter,TabEnter <buffer> :lua require'lsp_extensions'.inlay_hints{}
+autocmd BufEnter,BufWinEnter,TabEnter *.rs :lua require'lsp_extensions'.inlay_hints{}
 ```
 
 On cursor hover, get hints for current line:
 
 ```vimscript
-autocmd CursorHold,CursorHoldI <buffer> :lua require'lsp_extensions'.inlay_hints{ only_current_line = true }
+autocmd CursorHold,CursorHoldI *.rs :lua require'lsp_extensions'.inlay_hints{ only_current_line = true }
 ```
 
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