Update README.md to add utanzu.com blog

Add a blog illustrating the use of the tailwind-nextjs-starter-blog with Next.js v15 and app router directory structure.

Author: bensonmacharia

README.md

@@ -84,6 +84,7 @@ Internationalization support - [Template with i18n](https://tailwind-nextjs-star
 - [Wahyu Ikbal Personal Website](https://www.wahyuikbal.web.id) - Personal website with blog and ai feature, share about Technology literacy ([source code](https://github.com/wahyudesu/Personal-Website-Next-js-Obsidian-Ai-))
 - [ByteGeometry Blog](https://bytegeometry.com/blog) - Software development blog about tech trends and business growth. AI and web-apps development ([Project Link](https://bytegeometry.com))
 - [Farhad's Blog](https://www.farhad.my) - Farhad's personal website sharing tech news and insights on emerging technologies, with a focus on AI and Data Science ([Project Link](https://farhad.my))
+- [Utanzu Cybersecurity](https://utanzu.com/) – A thriving community where mentorship and expert training help cybersecurity professionals unlock their full potential and advance their careers.
 
 Using the template? Feel free to create a PR and add your blog to this list.