fix(deps): update spring core to v6

Author: renovate[bot]

pom.xml

@@ -80,7 +80,7 @@
         <ehcache.version>2.6.11</ehcache.version>
         <hibernate.version>3.6.10.Final</hibernate.version>
         <icu4j.version>72.1</icu4j.version>
-        <spring.version>4.3.30.RELEASE</spring.version>
+        <spring.version>6.1.13</spring.version>
         <resource-server.version>1.0.43</resource-server.version>
         <httpclient.version>4.5.14</httpclient.version>
         <antisamy.version>1.7.5</antisamy.version>