Update plugin org.sonarqube to v6 (#601)

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

Author: renovate[bot]

build.gradle

@@ -7,7 +7,7 @@ plugins {
   id 'org.owasp.dependencycheck' version '10.0.4'
   id 'org.springframework.boot' version '3.4.1'
   id 'com.github.ben-manes.versions' version '0.52.0'
-  id 'org.sonarqube' version '5.1.0.4882'
+  id 'org.sonarqube' version '6.3.1.5724'
   id "org.flywaydb.flyway" version '9.22.3'
   id 'info.solidsoft.pitest' version '1.15.0'
   id 'uk.gov.hmcts.java' version '0.12.67'