Bump org.testcontainers:testcontainers-bom in /jakarta-ee-example (#112)

Bumps [org.testcontainers:testcontainers-bom](https://github.com/testcontainers/testcontainers-java) from 1.19.0 to 1.20.4.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.0...1.20.4)

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

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Author: dependabot[bot]

jakarta-ee-example/pom.xml

@@ -19,7 +19,7 @@
     <junit-jupiter.version>5.11.4</junit-jupiter.version>
     <mockito-core.version>5.4.0</mockito-core.version>
     <microshed-testing.version>0.9.2</microshed-testing.version>
-    <testcontainers.version>1.19.0</testcontainers.version>
+    <testcontainers.version>1.20.4</testcontainers.version>
     <postgresql-jdbc-driver.version>42.2.16</postgresql-jdbc-driver.version>
     <mockserver-client-java.version>5.15.0</mockserver-client-java.version>
     <rest-assured.version>5.5.0</rest-assured.version>