Update dependency com.github.hmcts:service-auth-provider-java-client to v6

Author: renovate[bot]

build.gradle

@@ -420,7 +420,7 @@ dependencies {
   implementation group: 'ch.qos.logback', name: 'logback-classic', version: logbackVersion
   implementation group: 'ch.qos.logback', name: 'logback-core', version: logbackVersion
   implementation group: 'org.postgresql', name: 'postgresql', version: '42.7.11'
-  implementation group: 'com.github.hmcts', name: 'service-auth-provider-java-client', version: '5.3.4'
+  implementation group: 'com.github.hmcts', name: 'service-auth-provider-java-client', version: '6.0.0'
   implementation group: 'io.pebbletemplates', name: 'pebble', version: '4.1.2'
   implementation group: 'org.springframework.cloud', name: 'spring-cloud-starter-openfeign', version: '4.3.3'
   implementation group: 'commons-fileupload', name: 'commons-fileupload', version: '1.6.0'