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.
@@ -76,7 +76,7 @@ import org.asciidoctor.log.LogRecord;
/**
* Stores LogRecords in memory for later analysis.
*/
-public class MemoryLogHandler extends LogHandler {
+public class MemoryLogHandler implements LogHandler {
private List<LogRecord> logRecords = new ArrayList<>();
