chore(deps): update dependency org.jetbrains.dokka to v1.9.20

| datasource | package                                               | from   | to     |
| ---------- | ----------------------------------------------------- | ------ | ------ |
| maven      | org.jetbrains.dokka:org.jetbrains.dokka.gradle.plugin | 1.9.10 | 1.9.20 |

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ arrowGradleConfig = "0.12.0-rc.24"
 assertj = "3.25.3"
 coroutines = "1.8.0"
 classgraph = "4.8.165"
-dokka = "1.9.10"
+dokka = "1.9.20"
 jUnit = "4.13.2"
 jUnitJupiter = "5.10.2"
 jUnitVintage = "5.10.2"