Use latest 5.x Spring dependnecy

There was a high vuln in the 5.3.28 and 6.x has breaking changes.

Signed-off-by: Sven Strittmatter <[email protected]>

pom.xml

@@ -73,7 +73,7 @@
 
  <!-- Dependency versions: -->
  <com.fasterxml.jackson.version>2.16.1</com.fasterxml.jackson.version>
- <org.springframework.version>5.3.28</org.springframework.version>
+ <org.springframework.version>5.3.29</org.springframework.version>
  <org.mockito.version>5.9.0</org.mockito.version>
  </properties>