chore(deps): Update dependency org.jetbrains.kotlin:kotlin-gradle-plugin to v2

Author: renovate[bot]

gradle/libs.versions.toml

@@ -10,7 +10,7 @@ indra = "3.1.3"
 jetbrainsAnnotations = "26.0.2"
 jgit = "6.10.1.+"
 junit = "5.12.2"
-kotlin = "1.9.25"
+kotlin = "2.1.21"
 mammoth = "1.4.0"
 spotless = "7.0.3"