minor

index.md

@@ -87,7 +87,7 @@ Due to capacity constraints at the venue of the workshop, we kindly ask all part
 Use the following button to register:
 
 
-<a href="https://forms.office.com/e/uEVeKAjS2k" type="button" class="btn btn-primary d-lg-inline-block my-lg-0" target="_blank " disabled>Click here to register for the workshop</a>
+<a href="javascript:void(0)" type="button" class="btn btn-primary d-lg-inline-block my-lg-0 disabled" target="_blank " disabled>Click here to register for the workshop</a>
 
 **Your registration will be completed only after you receive a confirmation email from the organizers.**