deps: update dependency org.testcontainers:testcontainers-bom to v1.21.3 (#2123)

Author: renovate-bot

samples/spring-data-mybatis/googlesql/pom.xml

@@ -49,7 +49,7 @@
       <dependency>
         <groupId>org.testcontainers</groupId>
         <artifactId>testcontainers-bom</artifactId>
-        <version>1.21.2</version>
+        <version>1.21.3</version>
         <scope>import</scope>
         <type>pom</type>
       </dependency>

samples/spring-data-mybatis/postgresql/pom.xml

@@ -42,7 +42,7 @@
       <dependency>
         <groupId>org.testcontainers</groupId>
         <artifactId>testcontainers-bom</artifactId>
-        <version>1.21.2</version>
+        <version>1.21.3</version>
         <scope>import</scope>
         <type>pom</type>
       </dependency>