chore(deps): bump org.testcontainers:testcontainers

Bumps [org.testcontainers:testcontainers](https://github.com/testcontainers/testcontainers-java) from 1.20.2 to 1.20.3.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.2...1.20.3)

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

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

build.gradle.kts

@@ -17,7 +17,7 @@ val prometheusVersion = "0.16.0"
 val junitJupiterVersion = "5.11.3"
 val verapdfVersion = "1.26.1"
 val ktfmtVersion = "0.44"
-val testcontainersVersion= "1.20.2"
+val testcontainersVersion= "1.20.3"
 val pdfgencoreVersion = "1.1.32"
 val commonsCompressVersion = "1.27.1"