fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-6444790

pom.xml

@@ -13,7 +13,7 @@
         <junit.jupiter.version>5.9.1</junit.jupiter.version>
         <commons-logging.version>1.2</commons-logging.version>
         <log4j.version>2.19.0</log4j.version>
-        <spring.version>5.3.24</spring.version>
+        <spring.version>5.3.33</spring.version>
         <commons-fileupload.version>1.4</commons-fileupload.version>
         <commons-io.version>2.11.0</commons-io.version>
         <jackson.version>2.14.1</jackson.version>