Update README.md

- Added DOMPurify
- Set release version to 1.1

README.md

@@ -1,4 +1,4 @@
-# Mastowall 1.0
+# Mastowall 1.1
 
 Mastowall is a social wall application that displays posts from the [Mastodon](https://joinmastodon.org/) social network based on specified hashtags. It was written entirely by [ChatGPT4](https://openai.com/product/gpt-4), guided only by text prompts.
 
@@ -48,6 +48,8 @@ Mastowall is built using the following technologies:
 
 - **[Bootstrap](https://getbootstrap.com/)**: A popular CSS framework for responsive, mobile-first front-end web development.
 
+- **[DOMPurify](https://github.com/cure53/DOMPurify)**: Library for sanitizing HTML input, which should prevent the vast majority of malicious input from being rendered
+
 ## Usage
 
 1. Load the application in a web browser. If no hashtags are specified in the URL, you will be presented with a form to enter up to three hashtags and a server URL.