Update readme.txt changelog

https://wordpress.org/plugins/readme.txt
https://developer.wordpress.org/plugins/wordpress-org/how-your-readme-txt-works/

readme.txt

@@ -2,31 +2,37 @@
 Contributors: tomdxw, robdxw
 Tags: membership, private content, security
 Requires at least: 4.0
-Tested up to: 4.6.1
-Stable tag: 3.0.0
+Tested up to: 6.5.5
+Stable tag: 4.1.0
 License: MIT
 License URI: https://opensource.org/licenses/MIT
 
-Prevent users who aren't logged in from viewing your site. Whitelist selected content or IPs.
+Prevent users who aren't logged in from viewing your site. Allowlist selected content or IP addresses.
 
 == Description ==
 
 This plug-in allows site admins to make their site visible only to users who are
 logged in. It also provides options to make selected URIs publicly available, and
-to whitelist selected IPs so that they are not required to log in to view protected
-content.
+to allowlist selected IP addresses so that they are not required to log in to view
+protected content.
 
 == Installation ==
 
 1. Upload the plugin files to /wp-content/plugins/dxw-members-only, or install through the WordPress plugins interface
 2. Activate the plugin
 3. Visit Settings > dxw Members Only to set:
     - Any URIs that should be viewable by non-logged-in users
-    - IPs that can view the site without logging in
+    - IP addresses that can view the site without logging in
     - Where to redirect visitors who are not logged in and try to view restricted content
     - Whether to automatically restrict access to uploads by default
     - A max age for the cache-control header that will be served to any users who try to access restricted content when not logged in
 
 == Development ==
 
 https://github.com/dxw/dxw-members-only
+
+== Changelog ==
+
+= 4.1.1 =
+* For protected uploads, switch off output buffering and use `readfile()`
+