Fix version update

Author: JohannesRabauer

pom.xml

@@ -24,7 +24,7 @@
 		<!-- Should be in sync with org.eclipse.store:integrations-spring-boot3 -->
 		<org.springframework.boot.version>3.5.9</org.springframework.boot.version>
 		<org.eclipse.store.version>3.1.0</org.eclipse.store.version>
-		<org.eclipse.serializer.version>3.1.0</org.eclipse.serializer.version>
+		<org.eclipse.serializer.version>2.1.3</org.eclipse.serializer.version>
 		<org.eclipse.storage-restservice-springboot.version>3.1.0</org.eclipse.storage-restservice-springboot.version>
 	</properties>
 

spring-data-eclipse-store/pom.xml

@@ -53,7 +53,7 @@
 		<!-- Should be in sync with org.eclipse.store:integrations-spring-boot3 -->
 		<org.springframework.boot.version>3.5.9</org.springframework.boot.version>
 		<org.eclipse.store.version>3.1.0</org.eclipse.store.version>
-		<org.eclipse.serializer.version>3.1.0</org.eclipse.serializer.version>
+		<org.eclipse.serializer.version>2.1.3</org.eclipse.serializer.version>
 		<hibernate-validator.version>9.0.1.Final</hibernate-validator.version>
 		<jakarta.el-api.version>6.0.1</jakarta.el-api.version>
 		<expressly.version>6.0.0-M1</expressly.version>