fix(health): powershell "echo" fails without an arg #41477

runtime/lua/vim/health/health.lua

@@ -286,7 +286,7 @@ local function check_performance()
   local slow_cmd_time = 1.5e9
   local start_time = vim.uv.hrtime()
   -- Vimscript's system() is used to actually invoke a shell
-  vim.fn.system('echo')
+  vim.fn.system('echo 1')
   local elapsed_time = vim.uv.hrtime() - start_time
   if elapsed_time > slow_cmd_time then
     health.warn(