fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-8230364
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-8230365
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-8230366

pom.xml

@@ -61,8 +61,8 @@
         <httpcomponents.version>4.4.1</httpcomponents.version>
         <bouncycastle.version>1.72</bouncycastle.version>
         <!-- highest spring version is 5.3 due to Java 1.8 version -->
-        <spring.version>5.3.25</spring.version>
-        <spring-web.version>5.3.25</spring-web.version>
+        <spring.version>6.1.14</spring.version>
+        <spring-web.version>6.1.14</spring-web.version>
         <mockito.version>4.11.0</mockito.version>
         <hamcrest.version>2.2</hamcrest.version>
         <xmlunit.version>2.9.1</xmlunit.version>