[JAVA-28841] Fix maven-modules/multimodulemavenproject/maven-userdaomodule in the context of migration to JDK 21 (#16624)

Author: timis1

maven-modules/multimodulemavenproject/pom.xml

@@ -41,8 +41,8 @@
 
     <properties>
         <compiler.plugin.version>3.12.1</compiler.plugin.version>
-        <source.version>1.9</source.version>
-        <target.version>1.9</target.version>
+        <source.version>17</source.version>
+        <target.version>17</target.version>
     </properties>
 
 </project>