Update logback.xml

Author: inemtsev

frameworks/Kotlin/ktor/ktor-r2dbc/src/main/resources/logback.xml

@@ -10,12 +10,12 @@
         <appender-ref ref="STDOUT" />
     </appender>
 
-    <root level="WARN">
+    <root level="ERROR">
         <appender-ref ref="ASYNC"/>
     </root>
 
-    <logger name="org.eclipse.jetty" level="WARN"/>
-    <logger name="io.netty" level="WARN"/>
-    <logger name="io.r2dbc" level="WARN"/>
-    <logger name="reactor" level="WARN"/>
+    <logger name="org.eclipse.jetty" level="ERROR"/>
+    <logger name="io.netty" level="ERROR"/>
+    <logger name="io.r2dbc" level="ERROR"/>
+    <logger name="reactor" level="ERROR"/>
 </configuration>