Bump org.testcontainers:kafka from 1.19.8 to 1.20.1 in /start

Bumps [org.testcontainers:kafka](https://github.com/testcontainers/testcontainers-java) from 1.19.8 to 1.20.1.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.8...1.20.1)

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

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

Author: dependabot[bot]

start/inventory/pom.xml

@@ -80,7 +80,7 @@
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>kafka</artifactId>
-            <version>1.19.8</version>
+            <version>1.20.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>

start/system/pom.xml

@@ -78,7 +78,7 @@
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>kafka</artifactId>
-            <version>1.19.8</version>
+            <version>1.20.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>