Update CHANGELOG.md

Author: Fraenkiman

CHANGELOG.md

@@ -23,7 +23,7 @@ Smarty 5 now always runs in multibyte mode. Make sure you use the PHP [multibyte
         - Drag & drop now also available for mobile devices 
 
 ## Security
-- Detection of an HTTP/HTTPS connection ``is_https()`` is significantly more reliable and less susceptible to spoofing. Improved detection for public proxies/CDNs, including Azure and Cloudflare. ([#671](https://github.com/flatpressblog/flatpress/issues/671))
+- Detection of an HTTP/HTTPS connection ``is_https()`` is significantly more reliable and less susceptible to spoofing. Improved detection for public proxies/CDNs, including Azure and Cloudflare. ([#672](https://github.com/flatpressblog/flatpress/pull/672))
 
 ## Plugins
 ### Changes