Bump spring.boot.version from 2.7.17 to 3.3.4

Bumps `spring.boot.version` from 2.7.17 to 3.3.4.

Updates `org.springframework.boot:spring-boot-starter` from 2.7.17 to 3.3.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.17...v3.3.4)

Updates `org.springframework.boot:spring-boot-maven-plugin` from 2.7.17 to 3.3.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.17...v3.3.4)

Updates `org.springframework.boot:spring-boot-dependencies` from 2.7.17 to 3.3.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.17...v3.3.4)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.springframework.boot:spring-boot-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.springframework.boot:spring-boot-dependencies
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

pom.xml

@@ -42,7 +42,7 @@ limitations under the License.
 		<log4j.version>2.21.0</log4j.version>
 
 		<spring.version>5.3.30</spring.version>
-		<spring.boot.version>2.7.17</spring.boot.version>
+		<spring.boot.version>3.3.4</spring.boot.version>
 		<!--
 		DKF: if you update spring.boot.version, also update the annotation
 		processor binding in Eclipse for SpiNNaker-allocserv: