GeoModel version bumped to 5.3.0
- The update has been implemented via CMake overriders in
build_externals.shscripts - GeoModel 5.3.0 release notes
- Once this MR goes through, we need to finally update
GeoModelversion "properly", i.e. viaatlasexternals, and remove the overriders.
Edited by Vakhtang Tsulaia