Normalize contact email casing on about page

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: Denarzai

_tabs/about.md

@@ -24,4 +24,4 @@ I completed Harvard's CS50 Introduction to Cybersecurity and did my final projec
 
 - GitHub: [Denarzai](https://github.com/Denarzai)
 - LinkedIn: [subhan-cybersec](https://www.linkedin.com/in/subhan-cybersec)
-- Email: Sdenarzai786@gmail.com
+- Email: sdenarzai786@gmail.com