Bump logback-core from 1.2.3 to 1.2.9

Bumps logback-core from 1.2.3 to 1.2.9.

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

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

Author: dependabot[bot]

pom.xml

@@ -82,7 +82,7 @@
             <dependency>
                 <groupId>ch.qos.logback</groupId>
                 <artifactId>logback-core</artifactId>
-                <version>1.2.3</version>
+                <version>1.2.9</version>
             </dependency>
             <dependency>
                 <groupId>org.codehaus.groovy</groupId>