Bump ch.qos.logback:logback-classic from 1.5.14 to 1.5.15 (#253)

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Author: dependabot[bot]

pom.xml

@@ -61,7 +61,7 @@
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-classic</artifactId>
-      <version>1.5.14</version>
+      <version>1.5.15</version>
     </dependency>
     <!-- Test -->
     <dependency>