Bump logback-core to 1.5.23

Snyk has created this PR to upgrade ch.qos.logback:logback-core from
1.5.22 to 1.5.23.

https://logback.qos.ch/news.html#1.5.23

Signed-off-by: tobias.pobocik <tobias.pobocik@pantheon.tech>
(cherry picked from commit e6b4f66)

Author: snyk-bot

pom.xml

@@ -27,7 +27,7 @@
     <properties>
         <application.main.class>io.lighty.yang.validator.Main</application.main.class>
         <application.attach.zip>true</application.attach.zip>
-        <logback-version>1.5.22</logback-version>
+        <logback-version>1.5.23</logback-version>
     </properties>
 
     <dependencies>