The Roman Catholic Archdiocese of Cincinnati pleaded no contest yesterday to charges of failing to tell authorities about sex abuse allegations and was fined $10,000.  The prosecutor real the five counts of failure to report a felony aloud in court.  Each charged, a misdemeanor, regarded an institutional knowledge that certain felony sex crimes involving minors occurred.  The no-contest plea is not an admission of guilt, but means the defendant will not fight the charges.