Bump testcontainers.version from 1.19.7 to 1.19.8 (#1294)

Bumps `testcontainers.version` from 1.19.7 to 1.19.8.

Updates `org.testcontainers:testcontainers` from 1.19.7 to 1.19.8
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.7...1.19.8)

Updates `org.testcontainers:junit-jupiter` from 1.19.7 to 1.19.8
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.7...1.19.8)

Updates `org.testcontainers:postgresql` from 1.19.7 to 1.19.8
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.7...1.19.8)

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

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

backend/pom.xml

@@ -40,7 +40,7 @@
         <!-- Test dependency versions -->
         <archunit.version>1.3.0</archunit.version>
         <mockk.version>1.13.10</mockk.version>
-        <testcontainers.version>1.19.7</testcontainers.version>
+        <testcontainers.version>1.19.8</testcontainers.version>
         <apache.pdfbox.version>3.0.2</apache.pdfbox.version>
         <image.comparison.version>4.4.0</image.comparison.version>
     </properties>