Fix spelling and update homepage URL in README

Corrected spelling errors and updated homepage link.

Author: shagimuratov

README.md

@@ -85,7 +85,7 @@ Not sure how to remove malware with the plugin? Book a [WordPress malware remova
 
 Seucity and Malware check for frontend only avaible in the [Website Malware Scanner](https://cleantalk.org/website-malware-scanner). It scans by an URL, so you do not need to install any plugins.
 
-Home page is [https://cleantalk.org/wordpress-security-malware-firewall](https://cleantalk.org/wordpress-security-plugin)
+Home page is [https://cleantalk.org/wordpress-security-plugin](https://cleantalk.org/wordpress-security-plugin)
 
 == Frequently Asked Questions ==