Updates readme and changelog

Author: cabrerahector

changelog.md

@@ -1,7 +1,7 @@
 Changelog
 =========
 
-## 6.3.0 ##
+## 6.3.1 ##
 
 **If you're using a caching plugin on your website, clearing its cache after installing / updating to this version is highly recommended.**
 

readme.txt

@@ -5,7 +5,7 @@ Tags: popular, posts, widget, popularity, top
 Requires at least: 5.3
 Tested up to: 6.3
 Requires PHP: 7.2
-Stable tag: 6.3.0
+Stable tag: 6.3.1
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -109,7 +109,7 @@ The FAQ section has been moved [here](https://github.com/cabrerahector/wordpress
 
 == Changelog ==
 
-= 6.3.0 =
+= 6.3.1 =
 
 **If you're using a caching plugin on your website, clearing its cache after installing / updating to this version is highly recommended.**