fix(deps): update prometheusserverversion to v1.3.9

Author: renovate[bot]

dependencyManagement/build.gradle.kts

@@ -34,7 +34,7 @@ val jmhVersion = "1.37"
 val mockitoVersion = "4.11.0"
 val slf4jVersion = "2.0.17"
 val opencensusVersion = "0.31.1"
-val prometheusServerVersion = "1.3.8"
+val prometheusServerVersion = "1.3.9"
 val armeriaVersion = "1.32.5"
 val junitVersion = "5.12.2"