Added slide link and removed image

Author: melanieganz

PET-Is-Wonderful2025/README.md

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 [PET is wonderful 2025 Meeting](https://petiswonderful.org/) was held from the 2nd to 4th July 2025
 
-[PiW welcome ](https://raw.githubusercontent.com/openneuropet/outreach/main/PET-Is-Wonderful2025/figures/PiW2025_welcome.jpg)
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 Two sessions of the educational part of the conference were presented by OpenNeuroPET members:
 
-* Melanie talked about "PET data formats: past history and current resources"
+* Melanie talked about "[PET data formats: past history and current resources](https://raw.githubusercontent.com/openneuropet/outreach/main/PET-Is-Wonderful2025/PETisWonderful2025_Ganz.pdf)"
 * Martin introduced the audience to "Containerizing pre-processing tools for clinical PET"
 
-Both talks can be found below and were also recorded and will be distributed through the PET is wonderful website.
+Both talks can be found below and were also recorded and will be distributed through the PET is wonderful website.