Bump org.testcontainers:kafka from 1.21.2 to 1.21.3

Bumps [org.testcontainers:kafka](https://github.com/testcontainers/testcontainers-java) from 1.21.2 to 1.21.3.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.21.2...1.21.3)

---
updated-dependencies:
- dependency-name: org.testcontainers:kafka
  dependency-version: 1.21.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -58,7 +58,7 @@
       <dependency>
         <groupId>org.testcontainers</groupId>
         <artifactId>kafka</artifactId>
-        <version>1.21.2</version>
+        <version>1.21.3</version>
       </dependency>
 
       <dependency>