Add Vaibhav's presentation for ICHEP (RooFit + Clad)

Author: vaithak

_data/meetinglist.yml

@@ -30,6 +30,7 @@
         Clad, a compile-time AD library for C++ codebases. We also present the
         efficiency improvements with the recently released Atlas and CMS Higgs
         models.
+      slides: "/assets/presentations/Vaibhav_ICHEP.pdf"
     - title: Update
       speaker: Vassil Vassilev
       slides: "/assets/presentations/CR_11_07_2024.pdf"