Bump ch.qos.logback:logback-core in the maven group across 1 directory

Bumps the maven group with 1 update in the / directory: [ch.qos.logback:logback-core](https://github.com/qos-ch/logback).


Updates `ch.qos.logback:logback-core` 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
  dependency-group: maven
...

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

Author: dependabot[bot]

pom.xml

@@ -157,7 +157,7 @@
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
             <!-- max version -->
-            <version>1.2.13</version>
+            <version>1.3.15</version>
         </dependency>
         <!-- ignore: spring-web, spring-webmvc, spring-context -->
     </dependencies>