Bugfix/aditya059/fix issue 2905 (oracle#2906)

* Replaced 23.5 with 23.6 dockerfiles

* Added slash in prebuilt dockerfile copy command

Author: aditya059

OracleDatabase/SingleInstance/extensions/prebuiltdb/Dockerfile

@@ -36,7 +36,7 @@ ENV ORACLE_PDB=${ORACLE_PDB}
 ENV ORACLE_PWD=${ORACLE_PWD}
 ENV AUTO_MEM_CALCULATION=${AUTO_MEM_CALCULATION:-false}
 
-COPY --chown=oracle:dba setup/* "$ORACLE_BASE"/scripts/extensions/setup
+COPY --chown=oracle:dba setup/* "$ORACLE_BASE"/scripts/extensions/setup/
 
 # Creating the database
 RUN "$ORACLE_BASE/$RUN_FILE" --nowait