Update BlueObeliskData
For some atomic-related values, we use data from the Blue Obelisk Data Repository, specially the elements.xml file. This xml files is converted to a c++ header declaring those variables as arrays.
This updates the source xml and the generated .h
related to : #17791 (comment 701268) see also https://discourse.vtk.org/t/sensible-default-for-covalent-radius/2648/2
Edited by Nicolas Vuaille