Build(deps): bump org.springframework.boot in /packages/Manager

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.3.5 to 3.4.0.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.5...v3.4.0)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

packages/Manager/build.gradle.kts

@@ -5,7 +5,7 @@ import org.springframework.jdbc.datasource.SingleConnectionDataSource
 import org.springframework.jdbc.datasource.init.ScriptUtils.*
 
 plugins {
-  id("org.springframework.boot") version "3.3.5"
+  id("org.springframework.boot") version "3.4.0"
   id("io.spring.dependency-management") version "1.1.6"
   id("com.diffplug.spotless") version "6.25.0"
   id("org.flywaydb.flyway") version "10.21.0"