Hi Deepak,
Currently there are several versions of captcha widget/modules available on app store and one of them is reCaptcha Module that uses google captcha 2.0. Not sure if this is still compatible with version 8.9.0 but give it a try.
In this forum post Erwin mentioned he is working on Captcha 3.0 and will publish to app store once its ready, so stay tuned.
Hope this helps!