Update copyright

README.md

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 # State of CDR - Data Portal Workflow
 
-Copyright 2022-2024 IIASA
+Copyright 2024 IIASA and SOCDR contributors
 
 This work is licensed under <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">CC BY 4.0</a> <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank" rel="license noopener noreferrer" style="display:inline-block;"><img style="height:15px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg"><img style="height:15px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg"></a>