Update log4j2 monorepo to v2.25.4 (#3706)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build.gradle

@@ -317,9 +317,9 @@ dependencies {
   implementation group: 'com.github.hmcts', name: 'ccd-config-generator', version: '6.7.2'
   implementation group: 'com.github.hmcts', name: 'core-case-data-store-client', version: versions.ccdClient
   implementation group: 'com.github.hmcts.java-logging', name: 'logging', version: versions.reformsJavaLogging
-  implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.25.3'
-  implementation group: 'org.apache.logging.log4j', name: 'log4j-to-slf4j', version: '2.25.3'
-  implementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.25.3'
+  implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.25.4'
+  implementation group: 'org.apache.logging.log4j', name: 'log4j-to-slf4j', version: '2.25.4'
+  implementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.25.4'
   implementation group: 'com.github.hmcts', name: 'service-auth-provider-java-client', version: versions.serviceTokenGenerator
   implementation group: 'com.github.hmcts', name: 'send-letter-client', version: versions.sendLetterClient
   implementation group: 'uk.gov.service.notify', name: 'notifications-java-client', version: versions.hmctsNotify