Update ksp monorepo to v2.3.9 (#2321)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -15,7 +15,7 @@
 [versions]
 kotlin = "2.3.21"
 kct = "0.12.1"
-ksp = "2.3.8"
+ksp = "2.3.9"
 
 [plugins]
 kotlin-multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }