Bump testcontainers.version from 1.20.4 to 1.20.6 (#622)

Bumps `testcontainers.version` from 1.20.4 to 1.20.6.

Updates `org.testcontainers:testcontainers` from 1.20.4 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@1.20.4...1.20.6)

Updates `org.testcontainers:junit-jupiter` from 1.20.4 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@1.20.4...1.20.6)

---
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:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -74,7 +74,7 @@
     <mockito.version>4.11.0</mockito.version>
     <hc.stylecheck.version>1</hc.stylecheck.version>
     <rxjava.version>2.2.21</rxjava.version>
-    <testcontainers.version>1.20.4</testcontainers.version>
+    <testcontainers.version>1.20.6</testcontainers.version>
     <api.comparison.version>5.3</api.comparison.version>
     <hc.animal-sniffer.signature.ignores>javax.net.ssl.SSLEngine,javax.net.ssl.SSLParameters,java.nio.ByteBuffer,java.nio.CharBuffer</hc.animal-sniffer.signature.ignores>
   </properties>