Update README.md

See https://app.doboard.com/1/task/44495

Author: shagimuratov

README.md

@@ -93,3 +93,5 @@ Universal solution for any CMS or custom website: https://github.com/CleanTalk/p
 ### Websites that trust CleanTalk!
 
 ![CleanTalk Anti-Spam Rating](https://cleantalk.org/webpack/img/cleantalk_rating.png)
+
+CleanTalk as [reCAPCHA alternative](https://cleantalk.org/recaptcha-alternative).