Merge pull request #2387 from spring-cloud/dependabot/maven/main/testcontainers.version-1.21.4

Author: ryanjbaxter

pom.xml

@@ -50,7 +50,7 @@
 		<maven-surefire-plugin.version>3.5.4</maven-surefire-plugin.version>  <!-- @releaser:version-check-off -->
 		<awaitility.version>4.3.0</awaitility.version>
 		<artemis.version>2.44.0</artemis.version>
-		<testcontainers.version>1.21.3</testcontainers.version>
+		<testcontainers.version>1.21.4</testcontainers.version>
 		<hamcrest.version>3.0</hamcrest.version>
 
 		<!-- We need to have compatibility with Gradle -->