fix: remove parenthesis from find_git_ancestor call (#3166)

Author: Massolari

lua/lspconfig/server_configurations/drools_lsp.lua

@@ -37,7 +37,7 @@ end
 return {
   default_config = {
     filetypes = { 'drools' },
-    root_dir = util.find_git_ancestor(),
+    root_dir = util.find_git_ancestor,
     single_file_support = true,
     on_new_config = function(new_config)
       new_config.cmd = get_cmd(new_config)

lua/lspconfig/server_configurations/mutt_ls.lua

@@ -4,7 +4,7 @@ return {
   default_config = {
     cmd = { 'mutt-language-server' },
     filetypes = { 'muttrc', 'neomuttrc' },
-    root_dir = util.find_git_ancestor(),
+    root_dir = util.find_git_ancestor,
     single_file_support = true,
     settings = {},
   },