updating version numbers and README for 26.2

Update .zenodo.json

fixed json schema issues

add zendo config file to aid creation of DOI (geotools#3743)

Rename .zendo.json to .zenodo.json

updating version numbers and README for 25.4

updating version numbers and README for 26.1

updating version numbers and README for 25.3

updating version numbers and README for 26.0

updating version numbers and README for 26-RC

updating version numbers and README for 24.5