calendar: mark pentecost week as inactive

index.qmd

@@ -19,7 +19,7 @@ If not, don't worry, the lecture will be in a computer room.
 | 2024-04-30 | Complexity                                                           | Tobi, Dominik |
 | 2024-05-07 | Debugging Strategies| Dominik, Rene |
 | 2024-05-14 | Good scientific & coding practice | Bjorn, Theresa|
-| 2024-05-21 | User experience design                                                              | Theresa, Flo |
+| [2024-05-21]{.inactive} | User experience design                                                              | Theresa, Flo |
 | 2024-05-28 | Testing                                               | Nils, René |
 | 2024-06-04 | Git advanced  | Tobi, Nils |
 | 2024-06-11 | Parallelism | Georgiana, Claudia, JFE |