Bump the development-dependencies group with 1 update

Bumps the development-dependencies group with 1 update: [org.testcontainers:testcontainers-bom](https://github.com/testcontainers/testcontainers-java).


Updates `org.testcontainers:testcontainers-bom` from 1.19.5 to 1.19.6
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](https://github.com/testcontainers/testcontainers-java/compare/1.19.5...1.19.6)

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

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

build.gradle

@@ -115,7 +115,7 @@ ext {
     springSecurityVersion = '6.3.0-SNAPSHOT'
     springVersion = '6.1.4'
     springWsVersion = '4.0.10'
-    testcontainersVersion = '1.19.5'
+    testcontainersVersion = '1.19.6'
     tomcatVersion = '10.1.19'
     xmlUnitVersion = '2.9.1'
     xstreamVersion = '1.4.20'