Bump mysql-connector-java from 8.0.30 to 8.0.31 (#841)
Bump mysql-connector-java from 8.0.30 to 8.0.31 (#841)

Co-authored-by: Boni Garcia <1031a30a5f2c14441a7d88bcd3bc4060ea41571b@uc3m.es>
bonigarcia/mastering-junit5,bonigarcia/mastering-junit5