fix(command): copilot.lua version

Author: MunifTanjim

lua/copilot/util.lua

@@ -29,7 +29,8 @@ local copilot_lua_version = nil
 function M.get_copilot_lua_version()
   if not copilot_lua_version then
     local plugin_version_ok, plugin_version = pcall(function()
-      return vim.fn.systemlist("git rev-parse HEAD")[1]
+      local plugin_dir = vim.fn.fnamemodify(M.get_copilot_path(), ":h:h")
+      return vim.fn.systemlist(string.format("cd %s && git rev-parse HEAD", plugin_dir))[1]
     end)
     copilot_lua_version = plugin_version_ok and plugin_version or "dev"
   end