Bump org.testcontainers:testcontainers from 1.20.4 to 1.21.0

Bumps [org.testcontainers:testcontainers](https://github.com/testcontainers/testcontainers-java) from 1.20.4 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@1.20.4...1.21.0)

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

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

Author: dependabot[bot]

pom.xml

@@ -12,7 +12,7 @@
 
     <name>Infinispan Tutorial: Simple tutorials</name>
     <properties>
-        <testcontainers.version>1.20.6</testcontainers.version>
+        <testcontainers.version>1.21.0</testcontainers.version>
         <assertj.version>3.27.3</assertj.version>
     </properties>
     <repositories>