FIX: update link to PET-BIDS derivatives presentation

Author: mnoergaard

PETBIDS-Onboarding2025/README.md

@@ -95,7 +95,7 @@ This list may grow, but at present, we plan to provide hands-on training in the
 
 | Time   | Presenters         | Topic                                                           |
 |--------|--------------------|-----------------------------------------------------------------|
-| 09h00  | All                | [PET2BIDS conversion](https://github.com/openneuropet/outreach/blob/main/PETBIDS-Onboarding2025/PET2BIDS.pdf), PET-BIDS Derivatives & PET-Specific Considerations for Data Curation |
+| 09h00  | All                | [PET2BIDS conversion](https://github.com/openneuropet/outreach/blob/main/PETBIDS-Onboarding2025/PET2BIDS.pdf), [PET-BIDS Derivatives & PET-Specific Considerations for Data Curation](https://github.com/openneuropet/outreach/blob/main/PETBIDS-Onboarding2025/PET_BIDS_derivatives_NordicOnboarding2025.pdf) |
 | 10h30  | ☕                 | COFFEE, TEA & SNACKS                                            |
 | 11h00  | Martin Nørgaard    | PET-BIDS Tool Demonstrations and Tutorials: Image Analysis      |
 | 12h30  | 🧆                 | LUNCH                                                           |