⬆️ Bump testcontainers from 1.20.2 to 1.21.0

Bumps `testcontainers` from 1.20.2 to 1.21.0.

Updates `org.testcontainers:testcontainers` from 1.20.2 to 1.21.0
- [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...1.21.0)

Updates `org.testcontainers:junit-jupiter` from 1.20.2 to 1.21.0
- [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...1.21.0)

Updates `org.testcontainers:postgresql` from 1.20.2 to 1.21.0
- [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...1.21.0)

---
updated-dependencies:
- dependency-name: org.testcontainers:testcontainers
  dependency-version: 1.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:junit-jupiter
  dependency-version: 1.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:postgresql
  dependency-version: 1.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -8,7 +8,7 @@ protobuf = "4.28.0"
 logback = "1.4.7"
 jooq = "3.19.11"
 postgresql = "42.5.1"
-testcontainers = "1.20.2"
+testcontainers = "1.21.0"
 junit = "5.11.0"
 junit-platform-launcher = "1.7.0"
 strikt = "0.35.1"