fix: 修复 ncmd 的env和dir的错误

ncmd/cmd.go

@@ -289,8 +289,8 @@ func (c *Cmd) run() {
 	}
 	c.stdIn, _ = cmd.StdinPipe()
 
-	c.Env = cmd.Env
+	cmd.Env = c.Env
-	c.Dir = cmd.Dir
+	cmd.Dir = c.Dir
 
 	// Always close output streams. Do not do this after Wait because if Start
 	// fails and we return without closing these, it could deadlock the caller