Bump testcontainer.version from 1.21.3 to 1.21.4 (#486)

Author: jonesbusy

pom.xml

@@ -64,7 +64,7 @@
     <!-- Test dependencies version -->
     <logback.version>1.5.23</logback.version>
     <junit.version>6.0.1</junit.version>
-    <testcontainer.version>1.21.3</testcontainer.version>
+    <testcontainer.version>1.21.4</testcontainer.version>
     <wiremock.version>3.13.2</wiremock.version>
     <mockito.version>5.21.0</mockito.version>
     <system.stubs.version>2.1.8</system.stubs.version>