docs(kotlin_language_server): add storage path

lua/lspconfig/server_configurations/kotlin_language_server.lua

@@ -42,28 +42,16 @@ return {
     You could refer for this capability to:
     https://github.com/udalov/kotlin-vim (recommended)
     Note that there is no LICENSE specified yet.
+
+    For faster startup, you can setup caching by specifying a storagePath
+    in the init_options. The default is your home directory.
     ]],
     default_config = {
-      root_dir = [[root_pattern("settings.gradle")]],
+      root_dir = [[See source]],
       cmd = { 'kotlin-language-server' },
-      capabilities = [[
-      smart code completion,
-      diagnostics,
-      hover,
-      document symbols,
-      definition lookup,
-      method signature help,
-      dependency resolution,
-      additional plugins from: https://github.com/fwcd
-
-      Snipped of License (refer to source for full License):
-
-      The MIT License (MIT)
-
-      Copyright (c) 2016 George Fraser
-      Copyright (c) 2018 fwcd
-
-      ]],
+      init_options = {
+        storagePath = util.root_pattern(unpack(root_files))(vim.api.nvim_get_current_buf()),
+      },
     },
   },
 }