Update ksp monorepo to v2.3.1

Author: renovate[bot]

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ android-tools = "31.13.0"    # = 23.0.0 + agp
 compilerTesting = "0.7.1"
 kotlin = "2.1.20"
 kotlinPoet = "1.13.1"
-ksp = "2.1.20-1.0.32"
+ksp = "2.3.1"
 ktlint = "0.46.1"
 moshi = "1.15.2"