Bump org.springframework:spring-web from 5.3.32 to 6.0.18

Bumps [org.springframework:spring-web](https://github.com/spring-projects/spring-framework) from 5.3.32 to 6.0.18.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.32...v6.0.18)

---
updated-dependencies:
- dependency-name: org.springframework:spring-web
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -21,7 +21,7 @@
     </webappDirectory>
     <synapse.version>493.0</synapse.version>
     <gwtVersion>2.11.0</gwtVersion>
-    <org.springframework.version>5.3.32</org.springframework.version>
+    <org.springframework.version>6.0.18</org.springframework.version>
     <guiceVersion>3.0</guiceVersion>
     <ginVersion>2.1.2</ginVersion>
     <xstream.version>1.3.1</xstream.version>