Bump org.testcontainers:testcontainers from 1.20.6 to 1.21.0

Bumps [org.testcontainers:testcontainers](https://github.com/testcontainers/testcontainers-java) from 1.20.6 to 1.21.0.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.6...1.21.0)

---
updated-dependencies:
- dependency-name: org.testcontainers:testcontainers
  dependency-version: 1.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

plugin/pom.xml

@@ -44,7 +44,7 @@
 
     <!-- Library Dependencies Versions -->
     <eclipse-collections.version>9.2.0</eclipse-collections.version>
-    <testcontainers.version>1.20.6</testcontainers.version>
+    <testcontainers.version>1.21.0</testcontainers.version>
 
     <!-- Maven Surefire ArgLine -->
     <argLine>-Djava.awt.headless=true -Xmx1024m -Djenkins.test.timeout=1000 --add-opens java.base/java.lang=ALL-UNNAMED