Fix example on Logs Handling API documentation
Fix example on Logs Handling API documentation

The custom LogHandle given as an example in the Logs Handling API sections didn't work, as it used 'extends' rather than 'implements' to the LogHandler interface.
asciidoctor/asciidoctorj,abelsromero/asciidoctorj,abelsromero/asciidoctorj,abelsromero/asciidoctorj,asciidoctor/asciidoctorj,asciidoctor/asciidoctorj