Merge pull request #18 from bowtie-json-schema/dependabot/gradle/kotlin-2.1.21

chore(deps): bump kotlin from 2.1.20 to 2.1.21

Author: github-actions[bot]

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.1.20"
+kotlin = "2.1.21"
 json-schema-validator = "0.5.1"
 
 [plugins]