Update dependency org.jetbrains.kotlin:kotlin-gradle-plugin to v1.6.20

| datasource | package                                   | from   | to     |
| ---------- | ----------------------------------------- | ------ | ------ |
| maven      | org.jetbrains.kotlin:kotlin-gradle-plugin | 1.6.10 | 1.6.20 |

Author: renovate-bot

CHANGELOG.md

@@ -14,6 +14,7 @@
 
 ### Updated
 
+- `org.jetbrains.kotlin:kotlin-gradle-plugin -> 1.6.20`
 - `com.javiersc.gradle-plugins:all-plugins -> 0.1.0-rc.42`
 - `io.kotest:kotest-assertions-core -> 5.2.2`
 - `gradle -> 7.4.1`

gradle/pluginLibs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 javierscGradlePlugins = "0.1.0-rc.42"
-kotlin = "1.6.10"
+kotlin = "1.6.20"
 kotlinBinaryValidator = "0.8.0"
 
 [libraries]