Bump logback-core from 1.2.0 to 1.2.9 in /its/it-tests (#130)

Bumps logback-core from 1.2.0 to 1.2.9.

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-core
  dependency-type: direct:development
...

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Author: dependabot[bot]

its/it-tests/pom.xml

@@ -12,7 +12,7 @@
 
   <properties>
     <jetty.version>9.4.41.v20210516</jetty.version>
-    <logback.version>1.2.0</logback.version>
+    <logback.version>1.2.9</logback.version>
     <sonar.skip>true</sonar.skip>
     <skipTests>true</skipTests>
   </properties>