June 9 (Reuters) - A Tunisian court sentenced prominent journalist Khaoula Boukrim to four years in prison in absentia, she said on Tuesday, in a ruling critics say highlights a growing crackdown on critical voices and free speech under President Kais Saied. The ruling against Boukrim is the latest move against journalists following the jailing earlier this year of several media figures, including Zied Heni, Mourad Zghidi and Borhen Bsaies.