Bump ch.qos.logback:logback-core in /.ci/jenkins/tests

Bumps [ch.qos.logback:logback-core](https://github.com/qos-ch/logback) from 1.2.13 to 1.3.15.
- [Commits](qos-ch/logback@v_1.2.13...v_1.3.15)

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

Signed-off-by: dependabot[bot] <support@github.com>

.ci/jenkins/tests/pom.xml

@@ -74,7 +74,7 @@
         <logback.configration>logback-test.xml</logback.configration>
         <logdir>${project.build.directory}/log</logdir>
         <test.loglevel>ERROR</test.loglevel>
-        <log.logback.version>1.2.13</log.logback.version>
+        <log.logback.version>1.3.15</log.logback.version>
         <log.slf4j.version>1.7.25</log.slf4j.version>
         <build-helper-maven-plugin.version>1.9.1</build-helper-maven-plugin.version>