Update readme.md

Author: GUNJESH843

readme.md

@@ -12,7 +12,21 @@
 <img src="https://img.shields.io/github/last-commit/Sanjayviswa/Stackoverflow-Analysis">
 <img src="https://img.shields.io/github/languages/code-size/Sanjayviswa/Stackoverflow-Analysis">
 
-<!-- TABLE OF CONTENTS -->
+## Table of Contents
+1. [Demo Video](#-demo-video)
+2. [Prerequisites](#-prerequisites)
+3. [Installation Steps](#%EF%B8%8F-installation-steps)
+4. [Development](#development)
+5. [Finding Insights from Stack Overflow Developer Survey](#finding-insights-from-stack-overflow-developer-survey)
+6. [Project Goals](#project-goals)
+7. [Data Source and Background](#data-source-and-background)
+8. [Data Format](#data-format)
+9. [Expected Work](#expected-work)
+10. [Contributing](#-contributing)
+11. [License](#%EF%B8%8F-license)
+12. [Thanks to all Contributors](#-thanks-to-all-contributors)
+13. [Support](#-support)
+
 
 ## 👨‍💻 Demo Video