Bump kotlin.version from 2.0.0 to 2.0.20 (#353)

Bumps `kotlin.version` from 2.0.0 to 2.0.20.

Updates `org.jetbrains.kotlin:kotlin-maven-allopen` from 2.0.0 to 2.0.20

Updates `org.jetbrains.kotlin:kotlin-stdlib` from 2.0.0 to 2.0.20
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.0.0...v2.0.20)

Updates `org.jetbrains.kotlin:kotlin-maven-plugin` from 2.0.0 to 2.0.20

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-maven-allopen
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -21,7 +21,7 @@
         <java.version>21</java.version>
         <common.version>3.2024.09.16_11.09-578823a87a2f</common.version>
         <tjenestespesifikasjoner.version>1.2019.09.25-00.21-49b69f0625e0</tjenestespesifikasjoner.version>
-        <kotlin.version>2.0.0</kotlin.version>
+        <kotlin.version>2.0.20</kotlin.version>
         <poao-tilgang.version>2024.08.16_08.05-cb75bb5cbe10</poao-tilgang.version>
     </properties>