Update xml_serialization_version to v0.84.3 (#8079)

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

gradle/kotlinx.versions.toml

@@ -2,7 +2,7 @@
 kotlin_version = "1.7.10"
 coroutines_version = "1.6.4"
 serialization_version = "1.4.0"
-xml_serialization_version = "0.84.2"
+xml_serialization_version = "0.84.3"
 
 [libraries]
 reflect = { module = "org.jetbrains.kotlin:kotlin-reflect", version.ref = "kotlin_version" }