Update dependency com.launchdarkly:launchdarkly-java-server-sdk to v7.7.0 (#5948)

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

Author: renovate[bot]

service/build.gradle

@@ -315,7 +315,7 @@ dependencies {
   implementation group: 'org.apache.commons', name: 'commons-csv', version: '1.11.0'
   implementation 'org.apache.commons:commons-lang3:3.12.0'
 
-  implementation group: 'com.launchdarkly', name: 'launchdarkly-java-server-sdk', version: '7.6.0'
+  implementation group: 'com.launchdarkly', name: 'launchdarkly-java-server-sdk', version: '7.7.0'
   implementation group: 'com.github.ben-manes.caffeine', name: 'caffeine', version: '3.2.0'
 
   implementation group: 'org.flywaydb', name: 'flyway-core', version: '10.15.2'