fix(deps): update dependency org.springframework:spring-framework-bom to v6

Author: renovate[bot]

pom.xml

@@ -43,7 +43,7 @@
         <resource-server.version>1.3.1</resource-server.version>
         <servlet-api.version>3.1.0</servlet-api.version>
         <slf4j.version>2.0.6</slf4j.version>
-        <spring.version>4.3.30.RELEASE</spring.version>
+        <spring.version>6.2.1</spring.version>
 
         <!-- The JDBC Driver used by the portlet -->
         <jdbc.groupId>org.hsqldb</jdbc.groupId>