Update dependency com.hivemq:hivemq-mqtt-client to v1.3.9 (#586)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -11,7 +11,7 @@ gson = "2.13.1"
 gsonFire = "1.9.0"
 guava = "33.4.8-jre"
 hivemq-communityEditionEmbedded = "2025.4"
-hivemq-mqttClient = "1.3.8"
+hivemq-mqttClient = "1.3.9"
 hivemq-testcontainer = "2.0.0"
 javaNative = "21.0.2"
 javax-annotation-api = "1.3.2"