chore(deps): bump testcontainers.version in /app/server

Bumps `testcontainers.version` from 1.20.1 to 1.21.3.

Updates `org.testcontainers:junit-jupiter` from 1.20.1 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@1.20.1...1.21.3)

Updates `org.testcontainers:postgresql` from 1.20.1 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@1.20.1...1.21.3)

Updates `org.testcontainers:mongodb` from 1.20.1 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@1.20.1...1.21.3)

Updates `org.testcontainers:mysql` from 1.20.1 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@1.20.1...1.21.3)

Updates `org.testcontainers:r2dbc` from 1.20.1 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@1.20.1...1.21.3)

Updates `org.testcontainers:elasticsearch` from 1.20.1 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@1.20.1...1.21.3)

Updates `org.testcontainers:mssqlserver` from 1.20.1 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@1.20.1...1.21.3)

Updates `org.testcontainers:gcloud` from 1.20.1 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@1.20.1...1.21.3)

---
updated-dependencies:
- dependency-name: org.testcontainers:junit-jupiter
  dependency-version: 1.21.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:postgresql
  dependency-version: 1.21.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:mongodb
  dependency-version: 1.21.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:mysql
  dependency-version: 1.21.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:r2dbc
  dependency-version: 1.21.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:elasticsearch
  dependency-version: 1.21.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:mssqlserver
  dependency-version: 1.21.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:gcloud
  dependency-version: 1.21.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

app/server/pom.xml

@@ -50,7 +50,7 @@
         <snakeyaml.version>2.0</snakeyaml.version>
         <source.disabled>true</source.disabled>
         <spotless.version>2.36.0</spotless.version>
-        <testcontainers.version>1.20.1</testcontainers.version>
+        <testcontainers.version>1.21.3</testcontainers.version>
     </properties>
 
     <build>