Bump org.testcontainers:testcontainers from 1.20.5 to 1.20.6

Bumps [org.testcontainers:testcontainers](https://github.com/testcontainers/testcontainers-java) from 1.20.5 to 1.20.6.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.5...1.20.6)

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

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

Author: dependabot[bot]

build.gradle

@@ -25,7 +25,7 @@ wrapper {
 
 repositories { mavenLocal(); mavenCentral(); gradlePluginPortal() }
 dependencies {
-    implementation 'org.testcontainers:testcontainers:1.20.5'
+    implementation 'org.testcontainers:testcontainers:1.20.6'
 
     testImplementation('org.spockframework:spock-core:2.3-groovy-3.0') {
         exclude group: 'org.codehaus.groovy'