Update dependency org.postgresql:postgresql to v42.5.3

Author: renovate[bot]

build.gradle

@@ -227,7 +227,7 @@ dependencies {
     implementation group: 'com.github.hmcts', name: 'service-auth-provider-java-client', version: versions.reformS2sClient
     implementation group: 'com.github.hmcts.java-logging', name: 'logging', version: versions.reformLogging
     implementation group: 'com.github.hmcts.java-logging', name: 'logging-appinsights', version: versions.reformLogging
-    implementation group: 'org.postgresql', name: 'postgresql', version: '42.5.2'
+    implementation group: 'org.postgresql', name: 'postgresql', version: '42.5.3'
     implementation group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.5.14'
     implementation 'com.github.hmcts:properties-volume-spring-boot-starter:0.1.1'
     implementation 'commons-io:commons-io:20030203.000550'