chore(deps): update dependency org.ehcache:ehcache to v3.12.0

Author: renovate[bot]

metrics-jcache/pom.xml

@@ -19,7 +19,7 @@
     <properties>
         <javaModuleName>io.dropwizard.metrics5.jcache</javaModuleName>
         <cache-api.version>1.1.1</cache-api.version>
-        <ehcache3.version>3.11.1</ehcache3.version>
+        <ehcache3.version>3.12.0</ehcache3.version>
     </properties>
 
     <dependencyManagement>