update ToC

Author: JyotinderSingh

README.md

@@ -25,10 +25,12 @@ final_loss = train_model()
 - [Installation](#installation)
 - [Quick Start](#quick-start)
 - [Usage Examples](#usage-examples)
+- [Handling Data](#handling-data)
 - [Configuration](#configuration)
 - [Supported Accelerators](#supported-accelerators)
 - [Monitoring](#monitoring)
 - [Troubleshooting](#troubleshooting)
+- [Resource Cleanup](#resource-cleanup)
 - [Contributing](#contributing)
 - [License](#license)