Create README.md

Author: SuRu190

task06-update-heading/README.md

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+# Task 06 – Update Heading
+
+## ✅ Objective:
+Update a heading with the input provided by the user.
+
+## 💡 Concepts Practiced:
+- Input value handling
+- Updating DOM elements based on input
+
+## 📘 What I Learned:
+- How to read input using `.value`.
+- Updating DOM text using `.textContent`.
+
+## ▶️ Example Flow:
+1. User types a name in input.
+2. Click button → heading updates to show that name.