Update README.md

challenges/web/web warm-up/README.md

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-Challenge Name: Web Warm-up
+# Web Warm-up
+---
+Simple flag but why.html is it not showing?
 
-Challenge Description: Simple flag but why.html is it not showing?
+## Summary
+---
+- Author: Goh Zavier
+- Discord Username: twilightzon
+- Category: Web
+- Diffculty: Very Easy
+
+## Hints
+---
+None
+
+## Flag
+---
+``HEX{B@s1c_w3B_012siXJv}``