Document the reason why icu4j version is swapped from dependency
Document the reason why icu4j version is swapped from dependency

uhef/Oskari-Routing,nls-oskari/oskari-server,uhef/Oskari-Routing,uhef/Oskari-Routing,nls-oskari/oskari-server,nls-oskari/oskari-server,uhef/Oskari-Routing