updating testcontainers dependency to work around testcontainers/testcontainers-java#3574

Author: eitsch

example-service/pom.xml

@@ -76,12 +76,12 @@
     <dependency>
       <groupId>org.testcontainers</groupId>
       <artifactId>junit-jupiter</artifactId>
-      <version>1.15.0</version>
+      <version>1.15.3</version>
     </dependency>
     <dependency>
       <groupId>org.testcontainers</groupId>
       <artifactId>postgresql</artifactId>
-      <version>1.15.0</version>
+      <version>1.15.3</version>
     </dependency>
     <dependency>
       <groupId>org.skyscreamer</groupId>