fix(treesitter): adapt to upstream change (#3308)

In Nvim 0.11, `vim.treesitter.language.add()` returns `true` on success
or `nil,errmsg` on failure instead of throwing an error.

lua/telescope/utils.lua

@@ -662,7 +662,11 @@ end)
 --- Checks if treesitter parser for language is installed
 ---@param lang string
 utils.has_ts_parser = function(lang)
-  return pcall(vim.treesitter.language.add, lang)
+  if vim.fn.has "nvim-0.11" == 1 then
+    return vim.treesitter.language.add(lang)
+  else
+    return pcall(vim.treesitter.language.add, lang)
+  end
 end
 
 --- Telescope Wrapper around vim.notify