automatically updates using github actions
the idea was born here:
eu-digital-green-certificates/dgc-participating-countries#10
credits & source: https://www.github.com/lovasoa/sanipasse/tree/master/src%2Fassets%2FDigital_Green_Certificate_Signing_Keys.json
credits: ubirch.com
source: https://de.dscg.ubirch.com/trustList/DSC
credits: https://greencheck.gv.at/
source: https://greencheck.gv.at/api/masterdata
source: https://github.com/minvws/nl-covid19-coronacheck-mobile-core/blob/main/testdata/get.sh
credits: section42#3
source: https://dgcg.covidbevis.se/tp/trust-list
credits: section42#2
source: https://github.com/cn-uofbasel/ch-dcc-keys/
credits: section42#4