Add a note to Quickstart Guide informing that the topic.name should be in UPPERCASE 

The consumer and producer property `topic.name=<Oracle Database TxEventQ Topic>` should be in UPPERCASE.

> Database names, global database names, database link names, disk group names, and pluggable database (PDB) names are always case insensitive and are stored in uppercase.
https://docs.oracle.com/en/database/oracle/oracle-database/23/sqlrf/Database-Object-Names-and-Qualifiers.html