Update used JSON2XML-API

[StefanDumont]

Please update the use API for JSON2XML from https://correspSearch.net/api/v1.1/converter/json2xml.xql to https://correspSearch.net/api/v1.2/converter/json2xml.xql (1.1 to 1.2) in the next release.

[S0bi]

An update has been pushed to the dev-branch which fixes this issue