Update documetation of the SCT_RawDataByteStreamCnv package
https://its.cern.ch/jira/browse/ATLASRECTS-5238
https://atlas-sw-doxygen.web.cern.ch/atlas-sw-doxygen/atlas_22.0.X-DOX/docs/html/SCT_RawDataByteStreamCnv_page.html