Update default topic logging level in examples

Author: pnv1

ydb-cookbook/src/main/resources/log4j2.xml

@@ -28,7 +28,7 @@
         <Logger name="tech.ydb.table.Session" level="debug" additivity="false">
             <AppenderRef ref="Console"/>
         </Logger>
-        <Logger name="tech.ydb.topic" level="warn" additivity="false">
+        <Logger name="tech.ydb.topic" level="info" additivity="false">
             <AppenderRef ref="Console"/>
         </Logger>