Bump org.testcontainers:elasticsearch from 1.20.6 to 1.21.2

Bumps [org.testcontainers:elasticsearch](https://github.com/testcontainers/testcontainers-java) from 1.20.6 to 1.21.2.
- [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...1.21.2)

---
updated-dependencies:
- dependency-name: org.testcontainers:elasticsearch
  dependency-version: 1.21.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -15,7 +15,7 @@
         <log4j.version>2.24.3</log4j.version>
         <slf4j.version>2.0.17</slf4j.version>
         <junit.version>5.12.1</junit.version>
-        <testcontainers.version>1.20.6</testcontainers.version>
+        <testcontainers.version>1.21.2</testcontainers.version>
 
         <!-- JDK -->
         <java.compiler.version>17</java.compiler.version>