chore(deps): bump org.testcontainers:testcontainers

Bumps [org.testcontainers:testcontainers](https://github.com/testcontainers/testcontainers-java) from 1.21.0 to 1.21.1.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.21.0...1.21.1)

---
updated-dependencies:
- dependency-name: org.testcontainers:testcontainers
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -16,7 +16,7 @@ val prometheusVersion = "0.16.0"
 val junitJupiterVersion = "5.12.2"
 val verapdfVersion = "1.28.1"
 val ktfmtVersion = "0.44"
-val testcontainersVersion = "1.21.0"
+val testcontainersVersion = "1.21.1"
 val pdfgencoreVersion = "1.1.51"