Update README.md

Author: yuhsukeogawa

README.md

@@ -25,9 +25,10 @@ https://github.com/cisco-open/network-sketcher/assets/13013736/b76ec8fa-44ad-4d0
 # New Features
 - Ver 2.5.5<br>
 
-  -  [Export AI Context (Beta 3)](https://github.com/cisco-open/network-sketcher/wiki/7%E2%80%904.-Export-AI-Context)
-  
-  Support for generating commands to change data in master files has been added. **Always make a backup of the master file before executing a command that changes the master file.**
+  -  [Export AI Context (Beta 3)](https://github.com/cisco-open/network-sketcher/wiki/7%E2%80%904.-Export-AI-Context)<br>
+  -  [Network Sketcher AI Guide_Beta3_EN.pdf](https://github.com/user-attachments/files/23157146/Network.Sketcher.AI.Guide_Beta3_EN.pdf)
+
+  Sub-interfaces and VRFs have been added to the function that loads AI Context, configuration, and configuration diagrams into General-Purpose AI (LLM) and updates the master file.
 
 <img width="1095" height="398" alt="image" src="https://github.com/user-attachments/assets/2f84e038-1ef4-425e-b333-3ca3d2b5981e" />
 
@@ -164,3 +165,4 @@ limitations under the License.
 
 
 
+