gopls/doc: fix config for vim-lsp

Avoid duplicate results if name and and server info do not match

Change-Id: I9994c8136ec58fd84eccd5a236dc4160dde3395a
GitHub-Last-Rev: 451da60
GitHub-Pull-Request: #569
Reviewed-on: https://go-review.googlesource.com/c/tools/+/662555
Reviewed-by: Sean Liao <sean@liao.dev>
Auto-Submit: Sean Liao <sean@liao.dev>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Alberto Fanjul Alonso <albertofanjul@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

Author: albfan

gopls/doc/vim.md

@@ -56,7 +56,7 @@ Use [prabirshrestha/vim-lsp], with the following configuration:
 augroup LspGo
   au!
   autocmd User lsp_setup call lsp#register_server({
-      \ 'name': 'go-lang',
+      \ 'name': 'gopls',
       \ 'cmd': {server_info->['gopls']},
       \ 'whitelist': ['go'],
       \ })