Update all dependencies (#287)

| datasource | package                                                           | from     | to       |
| ---------- | ----------------------------------------------------------------- | -------- | -------- |
| maven      | org.http4k:http4k-bom                                             | 6.20.0.0 | 6.20.0.1 |
| maven      | org.jetbrains.kotlin.kapt:org.jetbrains.kotlin.kapt.gradle.plugin | 2.2.20   | 2.2.21   |
| maven      | org.jetbrains.kotlin.jvm:org.jetbrains.kotlin.jvm.gradle.plugin   | 2.2.20   | 2.2.21   |
| maven      | org.jetbrains.kotlin:kotlin-gradle-plugin                         | 2.2.20   | 2.2.21   |

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

Author: renovate[bot]

libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 jdk = "21"
-kotlin = "2.2.20"
+kotlin = "2.2.21"
 moshix = "0.32.0"
-http4k = "6.20.0.0"
+http4k = "6.20.0.1"
 immutables = "2.11.6"
 arrow = "2.1.2"
 graal = "25.0.1"