fix(ltex_plus): asciidoc is added to enabled languages (#4239)

Problem:
LTEX+ LS supports Asciidoc but it is not enabled by default.
Suggested way of extending configuration overrides the values,
since `filetypes` and `ltex.enabled` are Lua list.

Solution:
Add Asciidoc to the default list of enabled languages.

1 files changed, 2 insertions, 0 deletions

diff --git a/lsp/ltex_plus.lua b/lsp/ltex_plus.lua
index c241cb74..d9b9941c 100644
--- a/lsp/ltex_plus.lua
+++ b/lsp/ltex_plus.lua
@@ -36,6 +36,7 @@ local language_id_mapping = {
 return {
   cmd = { 'ltex-ls-plus' },
   filetypes = {
+    'asciidoc',
     'bib',
     'context',
     'gitcommit',
@@ -62,6 +63,7 @@ return {
   settings = {
     ltex = {
       enabled = {
+        'asciidoc',
         'bib',
         'context',
         'gitcommit',