Update dependency org.testcontainers:testcontainers-bom to v1.21.0

Author: xdev-renovate

demo/pom.xml

@@ -192,7 +192,7 @@
 			<dependency>
 				<groupId>org.testcontainers</groupId>
 				<artifactId>testcontainers-bom</artifactId>
-				<version>1.20.6</version>
+				<version>1.21.0</version>
 				<type>pom</type>
 				<scope>import</scope>
 			</dependency>