Bump the postgresql group with 3 updates

Bumps the postgresql group with 3 updates: [org.testcontainers:testcontainers](https://github.com/testcontainers/testcontainers-java), [org.testcontainers:junit-jupiter](https://github.com/testcontainers/testcontainers-java) and [org.testcontainers:postgresql](https://github.com/testcontainers/testcontainers-java).


Updates `org.testcontainers:testcontainers` 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)

Updates `org.testcontainers:junit-jupiter` 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)

Updates `org.testcontainers:postgresql` 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
  dependency-group: postgresql
- dependency-name: org.testcontainers:junit-jupiter
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: postgresql
- dependency-name: org.testcontainers:postgresql
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: postgresql
...

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

Author: dependabot[bot]

pom.xml

@@ -37,7 +37,7 @@
         <junit-jupiter.version>5.5.2</junit-jupiter.version>
         <assertj-core.version>3.13.2</assertj-core.version>
         <mockito-all.version>1.10.19</mockito-all.version>
-        <testcontainers.version>1.20.5</testcontainers.version>
+        <testcontainers.version>1.20.6</testcontainers.version>
         <mockito-junit-jupiter.version>3.1.0</mockito-junit-jupiter.version>
 
         <spring-boot-starter-parent.version>3.4.3</spring-boot-starter-parent.version>