Bump version.kotlin from 2.3.10 to 2.3.20

Bumps `version.kotlin` from 2.3.10 to 2.3.20.

Updates `org.jetbrains.kotlin:kotlin-maven-plugin` from 2.3.10 to 2.3.20

Updates `org.jetbrains.kotlin:kotlin-stdlib` from 2.3.10 to 2.3.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.3.10...v2.3.20)

Updates `org.jetbrains.kotlin:kotlin-compiler-embeddable` from 2.3.10 to 2.3.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.3.10...v2.3.20)

Updates `org.jetbrains.kotlin:kotlin-build-tools-impl` from 2.3.10 to 2.3.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.3.10...v2.3.20)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-maven-plugin
  dependency-version: 2.3.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-version: 2.3.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-compiler-embeddable
  dependency-version: 2.3.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-build-tools-impl
  dependency-version: 2.3.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -44,7 +44,7 @@
         <version.jetbrains-annotations>26.1.0</version.jetbrains-annotations>
         <version.jspecify>1.0.0</version.jspecify>
         <version.kotest>6.0.3</version.kotest>
-        <version.kotlin>2.3.10</version.kotlin>
+        <version.kotlin>2.3.20</version.kotlin>
         <version.kotlinpoet>2.2.0</version.kotlinpoet>
         <version.ksp>2.3.6</version.ksp>
         <version.slf4j>2.0.17</version.slf4j>