BE: Chore: Update logback config appender format (#3829)

Co-authored-by: iliax <ikuramshin@provectus.com>

kafka-ui-api/src/main/resources/application.yml

@@ -17,4 +17,5 @@ logging:
     root: INFO
     com.provectus: DEBUG
     reactor.netty.http.server.AccessLog: INFO
+    org.hibernate.validator: WARN
 

kafka-ui-api/src/main/resources/logback-spring.xml

@@ -1,17 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
 
-        <appender name="STDOUT"
-              class="ch.qos.logback.core.ConsoleAppender">
-        <layout class="ch.qos.logback.classic.PatternLayout">
-            <Pattern>
-                %black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%c{1}): %msg%n%throwable
-            </Pattern>
-        </layout>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%c{1}): %msg%n%throwable</pattern>
+        </encoder>
     </appender>
 
     <root level="info">
-        <appender-ref ref="STDOUT" />
+        <appender-ref ref="STDOUT"/>
     </root>
 
 </configuration>