Bump the development-dependencies group with 2 updates (#8986)

Bumps the development-dependencies group with 2 updates: [org.testcontainers:testcontainers-bom](https://github.com/testcontainers/testcontainers-java) and org.jetbrains.dokka.


Updates `org.testcontainers:testcontainers-bom` from 1.19.6 to 1.19.7
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.6...1.19.7)

Updates `org.jetbrains.dokka` from 1.9.10 to 1.9.20

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

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

Author: dependabot[bot]

build.gradle

@@ -19,7 +19,7 @@ plugins {
     id 'io.spring.nohttp' version '0.0.11' apply false
     id 'org.ajoberstar.grgit' version '5.2.2'
     id 'io.spring.dependency-management' version '1.1.4'
-    id 'org.jetbrains.dokka' version '1.9.10'
+    id 'org.jetbrains.dokka' version '1.9.20'
     id 'org.antora' version '1.0.0'
     id 'io.spring.antora.generate-antora-yml' version '0.0.1'
     id 'com.github.spotbugs' version '6.0.8'
@@ -115,7 +115,7 @@ ext {
     springSecurityVersion = '6.3.0-SNAPSHOT'
     springVersion = '6.1.4'
     springWsVersion = '4.0.10'
-    testcontainersVersion = '1.19.6'
+    testcontainersVersion = '1.19.7'
     tomcatVersion = '10.1.19'
     xmlUnitVersion = '2.9.1'
     xstreamVersion = '1.4.20'