Update logback15.version to v1.5.7

Author: renovate[bot]

metrics-logback15/pom.xml

@@ -17,7 +17,7 @@
 
     <properties>
         <javaModuleName>io.dropwizard.metrics.logback15</javaModuleName>
-        <logback15.version>1.5.6</logback15.version>
+        <logback15.version>1.5.7</logback15.version>
 
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>