Mark glossary task as completed in TODO.md

Author: jedisct1

www/TODO.md

@@ -9,7 +9,7 @@ This document outlines planned improvements and future tasks for the IPCrypt web
 - [ ] Add detailed explanations of each encryption mode with diagrams
 - [x] Create implementation-specific pages with code examples
 - [x] Add a FAQ section addressing common questions
-- [ ] Create a glossary of terms for technical concepts
+- [x] Create a glossary of terms for technical concepts
 - [ ] Add case studies or examples of IPCrypt in real-world applications
 
 ### Design Improvements