Bump ch.qos.logback:logback-classic from 1.5.12 to 1.5.15

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.5.12 to 1.5.15.
- [Commits](qos-ch/logback@v_1.5.12...v_1.5.15)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-classic
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -17,7 +17,7 @@
     <jackson.version>2.18.2</jackson.version>
 
     <synapse-junit-extension.version>1.3</synapse-junit-extension.version>
-    <logback-classic.version>1.5.12</logback-classic.version>
+    <logback-classic.version>1.5.15</logback-classic.version>
     <commons-codec.version>1.13</commons-codec.version>
     <commons-lang3.version>3.12.0</commons-lang3.version>
     <junit.version>5.9.3</junit.version>