Update dependency com.github.hmcts:service-auth-provider-java-client to v5.3.0

Author: renovate[bot]

Diff for: build.gradle

@@ -272,7 +272,7 @@ dependencies {
   implementation group: 'com.github.hmcts', name: 'idam-java-client', version: '3.0.3'
   implementation group: 'com.github.hmcts', name: 'java-logging', version: '6.1.7'
   implementation group: 'com.github.hmcts', name: 'send-letter-client', version: '4.0.4'
-  implementation group: 'com.github.hmcts', name: 'service-auth-provider-java-client', version: '5.2.0'
+  implementation group: 'com.github.hmcts', name: 'service-auth-provider-java-client', version: '5.3.0'
   implementation group: 'com.github.hmcts', name: 'ccd-case-document-am-client', version: '1.7.3'
 
   implementation group: 'org.apache.tomcat.embed', name: 'tomcat-embed-core'
@@ -323,7 +323,7 @@ dependencies {
   functionalTestImplementation sourceSets.main.runtimeClasspath
   functionalTestImplementation sourceSets.test.runtimeClasspath
 
-  functionalTestImplementation group: 'com.github.hmcts', name: 'service-auth-provider-java-client', version: '5.2.0'
+  functionalTestImplementation group: 'com.github.hmcts', name: 'service-auth-provider-java-client', version: '5.3.0'
 
   // Provides fast-reload of just the NFDIV service.
   cftlibImplementation 'org.springframework.boot:spring-boot-devtools'