Update registration

Author: wesbland

_data/meetings/2025/09/attendance.csv

@@ -55,3 +55,6 @@
 "Yonghong Yan","UNC Charlotte","0","1"
 "Mike Wilkins","Cornelis Networks","1","1"
 "Simon Pickartz","ParTec","1","1"
+"Matthew Dosanjh","Sandia National Laboratory","1","1"
+"David Boehme","Lawrence Livermore National Laboratory","0","1"
+"Claudia Blaas-Schenner","VSC Research Center, TU Wien","1","1"