Bump org.jetbrains.kotlin:kotlin-gradle-plugin from 2.2.20 to 2.2.21

Author: rwinch

gradle/libs.versions.toml

@@ -68,7 +68,7 @@ org-hamcrest = "org.hamcrest:hamcrest:2.2"
 org-hibernate-orm-hibernate-core = "org.hibernate.orm:hibernate-core:7.0.10.Final"
 org-hsqldb = "org.hsqldb:hsqldb:2.7.4"
 org-jetbrains-kotlin-kotlin-bom = { module = "org.jetbrains.kotlin:kotlin-bom", version.ref = "org-jetbrains-kotlin" }
-org-jetbrains-kotlin-kotlin-gradle-plugin = "org.jetbrains.kotlin:kotlin-gradle-plugin:2.2.20"
+org-jetbrains-kotlin-kotlin-gradle-plugin = "org.jetbrains.kotlin:kotlin-gradle-plugin:2.2.21"
 org-jetbrains-kotlinx-kotlinx-coroutines-bom = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-bom", version.ref = "org-jetbrains-kotlinx" }
 org-junit-junit-bom = "org.junit:junit-bom:6.0.0"
 org-mockito-mockito-bom = { module = "org.mockito:mockito-bom", version.ref = "org-mockito" }