Bump testcontainers from 1.21.2 to 1.21.3 (#1114)

Bumps `testcontainers` from 1.21.2 to 1.21.3.

Updates `org.testcontainers:testcontainers` 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)

Updates `org.testcontainers:junit-jupiter` 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:testcontainers
  dependency-version: 1.21.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.testcontainers:junit-jupiter
  dependency-version: 1.21.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -15,7 +15,7 @@ assertj = "3.27.3"
 awaitility = "4.3.0"
 mockito = "5.17.0"
 wiremock = "3.0.1"
-testcontainers = "1.21.2"
+testcontainers = "1.21.3"
 braveBom = "6.2.0"
 bravePropagationW3c = "0.2.0"
 zipkinReporterBom = "3.5.1"