Update file README.md

README.md

@@ -10,7 +10,7 @@ The Graph-Based Dataset for IoT Network Attack Detection is a curated collection
 The dataset consists of network traffic data captured from emulated IoT network environments, where various attack scenarios have been emulated. The network traffic data is represented in the form of graphs, capturing the interactions and relationships between different devices, services, and communication patterns within the IoT network. Each graph in the dataset represents a snapshot of network activity over a specific time period, enabling analysis of attack patterns and behaviors. The following figure presents the general netwok architecture.
 
 <div align="center">
-<img src="image-1.png" alt="alt text" width="500" />
+<img src="image-1.png" alt="alt text" width="500" title="Overview of the IoT network architecture" />
 <em>Overview of the IoT network architecture</em>
 </div>