Bump spring-web from 5.3.20 to 6.0.0 in /app

Bumps [spring-web](https://github.com/spring-projects/spring-framework) from 5.3.20 to 6.0.0.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.20...v6.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

app/pom.xml

@@ -55,7 +55,7 @@ limitations under the License.
         <maven-antrun.version>1.0b3</maven-antrun.version>
         <rome.version>1.18.0</rome.version>
         <slf4j.version>1.7.36</slf4j.version>
-        <spring.version>5.3.20</spring.version>
+        <spring.version>6.0.0</spring.version>
         <spring.security.version>5.7.1</spring.security.version>
         <struts.version>2.5.29</struts.version>
         <velocity.version>2.3</velocity.version>