Update README.md

Author: mrikirill

README.md

@@ -18,6 +18,7 @@
 * Supports single domains, multidomains, subdomains and regional domains, or any combination thereof (example: dev.my.domain.com.au, domain.com.uk etc)
 * Easy instalation process
 * Based on CloudFlare API v4
+* [Supports IPv4 and IPv6](https://github.com/mrikirill/SynologyDDNSCloudflareMultidomain/pull/13)
 
 ## Before you begin
 
@@ -149,4 +150,4 @@ Source [Identifying network ports compatible with Cloudflare's proxy](https://su
 ## Credits
 
 <small><i><a href='http://ecotrust-canada.github.io/markdown-toc/'>Table of contents generated with markdown-toc</a></i></small>  
-<small><i><a href='https://www.youtube.com/watch?v=Nf7m3h11y-s'>DB Tech - creating API keys and using Cloudflare CNAME for single updates</a></i></small>
+<small><i><a href='https://www.youtube.com/watch?v=Nf7m3h11y-s'>DB Tech - creating API keys and using Cloudflare CNAME for single updates</a></i></small>