Bump ch.qos.logback:logback-classic from 1.3.14 to 1.3.15 (#114)

Author: dependabot[bot]

build.gradle

@@ -37,7 +37,7 @@ dependencies {
   implementation 'org.ehcache:ehcache:3.10.8'
   implementation 'org.slf4j:slf4j-api:2.0.17'
   // Logback classic 1.3.x is compatible with java 8
-  implementation 'ch.qos.logback:logback-classic:1.3.14'
+  implementation 'ch.qos.logback:logback-classic:1.3.15'
   implementation 'org.jetbrains:annotations:26.0.2'
 
   testImplementation 'cloud.eppo:sdk-common-jvm:3.5.4:tests'