[k8s] update links

Author: mincong-h

esigelec/2025/index.md

@@ -1,6 +1,6 @@
 ---
 layout:         post
-title:          Kubernetes
+title:          Kubernetes 2025
 subtitle: >
   Welcome to the world of containers!
 
@@ -58,11 +58,11 @@ timeline
 
 Chapter   |         Date |  Slides | Assignment
 :-------- | -----------: | :------ | :---------
-Chapter 1 | 20 Oct, 2025 | [slides](/esigelec/1) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-1.md)
-Chapter 2 | 21 Oct, 2025 | [slides](/esigelec/2) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-2.md)
-Chapter 3 | 28 Oct, 2025 | [slides](/esigelec/3) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-3.md)
-Chapter 4 | 29 Oct, 2025 | [slides](/esigelec/4) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-4.md)
-Chapter 5 | 30 Oct, 2025 | [slides](/esigelec/5) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-5.md)
+Chapter 1 | 20 Oct, 2025 | [slides](/esigelec/2025/1) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-1.md)
+Chapter 2 | 21 Oct, 2025 | [slides](/esigelec/2025/2) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-2.md)
+Chapter 3 | 28 Oct, 2025 | [slides](/esigelec/2025/3) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-3.md)
+Chapter 4 | 29 Oct, 2025 | [slides](/esigelec/2025/4) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-4.md)
+Chapter 5 | 30 Oct, 2025 | [slides](/esigelec/2025/5) | [assignment](https://github.com/mincong-classroom/containers/blob/main/docs/lab-5.md)
 
 Other resources: