Update registration.md

Abstract shall be submitted by email. Registration instructions updated accordingly

content/registration.md

@@ -22,10 +22,12 @@ weight = 4
 ## Registration, Payment, and Abstract Submission
 To attend the conference, please follow the two steps outlined below:
 
-1. Conference registration should be completed through this [registration form](https://forms.gle/VPC8UDni7dvzs82u7). As part of the registration process, participants are required to submit an abstract. The abstract should be uploaded in PDF format, following the provided <a href="firstname-lastname.docx" download="firstname-lastname.docx" class="btn">Word</a> or <a href="firstname-lastname.tex" download="firstname-lastname.tex" class="btn">LaTeX</a> templates.
+1. Conference registration should be completed through this [registration form](https://forms.gle/VPC8UDni7dvzs82u7).
 
 2. Payment of the registration fee should be made through this [online site](https://hi.converia.de/frontend/index.php?sub=123). The registration fees are as follows: €150 for regular participants and €70 for students. Invited speakers will receive a voucher to waive the conference fee.
 
+IMPORTANT: If you plan to give a presentation (invited talk, contributed talk or poster), please give a tentative title when you register. The abstract should be sent to [Luca Frediani](mailto:[[email protected]]) in PDF format, following the provided <a href="firstname-lastname.docx" download="firstname-lastname.docx" class="btn">Word</a> or <a href="firstname-lastname.tex" download="firstname-lastname.tex" class="btn">LaTeX</a>.
+
 
 Registration and payment of the registration fee must be completed by April 30th, 2025.