Bump org.jetbrains.kotlin:kotlin-stdlib from 2.3.20 to 2.3.21 (ExpediaGroup#664)

Bumps [org.jetbrains.kotlin:kotlin-stdlib](https://github.com/JetBrains/kotlin) from 2.3.20 to 2.3.21.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.3.20...v2.3.21)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-version: 2.3.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -57,7 +57,7 @@
         <testng.version>7.12.0</testng.version>
         <assertj-core.version>3.27.7</assertj-core.version>
         <joda-time.version>2.14.1</joda-time.version>
-        <kotlin.version>2.3.20</kotlin.version>
+        <kotlin.version>2.3.21</kotlin.version>
         <!-- validation dependencies -->
         <hibernate-validator.version>9.0.0.Final</hibernate-validator.version>
         <jboss-logging.version>3.6.3.Final</jboss-logging.version>