fix: Fix test name uniqueness

Author: PerfectSlayer

dd-java-agent/agent-ci-visibility/src/test/groovy/datadog/trace/civisibility/config/EarlyFlakeDetectionSettingsSerializerTest.groovy

@@ -6,7 +6,7 @@ import spock.lang.Specification
 
 class EarlyFlakeDetectionSettingsSerializerTest extends Specification {
 
-  def "test serialization: #settings"() {
+  def "test serialization: #iterationIndex"() {
     when:
     Serializer s = new Serializer()
     EarlyFlakeDetectionSettingsSerializer.serialize(s, settings)