update systems

index.md

@@ -50,8 +50,8 @@ So stay tuned and drop us an [email](mailto:[email protected])
 
 The following slide deck and video playlist provide the last snapshot of the current material.
 
- [slides](https://github.com/potassco-asp-course/course/releases/download/v1.21.0/main.pdf)
-         (v1.21.0)
+ [slides](https://github.com/potassco-asp-course/course/releases/download/v1.22.0/main.pdf)
+         (v1.22.0)
  [git](https://github.com/potassco-asp-course/course)
  [videos](https://www.youtube.com/playlist?list=PL7DBaibuDD9P5yRyq_Oyn-wuYpBayz_0h) 16h24m49s
 
@@ -176,5 +176,5 @@ The following slide deck and video playlist provide the last snapshot of the cur
 
 ### Systems
 
- [slides](https://github.com/potassco-asp-course/course/releases/download/v1.21.0/systems.pdf)
+ [slides](https://github.com/potassco-asp-course/course/releases/download/v1.22.0/systems.pdf)
  [workspace](/systems/)

systems.md

@@ -5,9 +5,9 @@ permalink: /systems/
 ---
 ### Lecture slides
 
-  [pdf](https://github.com/potassco-asp-course/course/releases/download/v1.21.0/systems.pdf)
+  [pdf](https://github.com/potassco-asp-course/course/releases/download/v1.22.0/systems.pdf)
   [git](https://github.com/potassco-asp-course/systems)
-  [v.21.0](https://github.com/potassco-asp-course/course/releases/tag/v1.21.0)
+  [v.22.0](https://github.com/potassco-asp-course/course/releases/tag/v1.22.0)
 
 ### Literature