Bump testcontainers version

Author: johnoliver

data/semantickernel-data-oracle/pom.xml

@@ -13,7 +13,7 @@
     <description>Provides a Oracle connector for the Semantic Kernel</description>
 
     <properties>
-        <testcontainers.version>1.20.4</testcontainers.version>
+        <testcontainers.version>1.21.4</testcontainers.version>
     </properties>
 
     <dependencyManagement>