Bump org.testcontainers:k3s from 1.18.0 to 1.20.1

Bumps [org.testcontainers:k3s](https://github.com/testcontainers/testcontainers-java) from 1.18.0 to 1.20.1.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.18.0...1.20.1)

---
updated-dependencies:
- dependency-name: org.testcontainers:k3s
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

spring-cloud-kubernetes-integration-tests/pom.xml

@@ -18,7 +18,7 @@
 	<properties>
 		<java.version>17</java.version>
 		<docker-java.version>3.2.13</docker-java.version>
-		<testcontainers.version>1.18.3</testcontainers.version>
+		<testcontainers.version>1.20.1</testcontainers.version>
 	</properties>
 
 	<build>

spring-cloud-kubernetes-test-support/pom.xml

@@ -13,7 +13,7 @@
 
 	<properties>
 		<awaitility.version>4.0.3</awaitility.version>
-		<testcontainers.version>1.18.3</testcontainers.version>
+		<testcontainers.version>1.20.1</testcontainers.version>
 	</properties>
 	<dependencies>